Amid all the revelations of corruption at the Supreme Court, one glib social-media defense of the conservative justices has been about ideology. As the (ridiculous) argument goes, these scandals aren’t actually scandals because the gifts and cash that flowed from right-wing billionaires and conservative activist Leonard Leo’s dark money network don’t actually influence the justices. Why? Because the justices were already conservative and were always going to vote the way they voted on cases of interest to their paymasters.

But that analysis misses how corruption works on a systemic level.

As the Founders noted, judges are given lifetime appointments for the explicit purpose of preserving an “independent spirit” that allows them to change their views without fear of consequences. And in fact, data suggests that in the past, many conservative justices have become more liberal as they age.

In light of that, the money and gifts flowing to conservative justices can be seen not merely as cheap influence-peddling schemes to secure specific rulings in individual cases. It can also be seen as a grand plan to deter the ideological freedom that lifetime appointments afford.

In short, the largesse from billionaires and Leo — who helped assemble the Supreme Court’s 6-3 conservative supermajority as President Donald Trump’s judicial adviser — creates personal financial incentives for justices to remain doctrinaire ideologues and resist any deviation from the conservative line, even if they might once in a while have an inkling to dissent.

No doubt, preventing this so-called “ideological drift” is exactly the point, as Five To Four’s Michael Liroff noted in a recent episode of Lever Live. From Earl Warren to William Brennan to John Paul Stevens to David Souter, the Republican Supreme Court appointees who ended up becoming liberals haunt the psyche of the right’s judicial activists. It is this dynamic that conservative puppet masters most want to prevent, because it has not been an anomaly.

In 2015, FiveThirtyEight parsed the data and quantified a big trend in its headline: “Supreme Court Justices Get More Liberal As They Get Older.”

As you can see in the chart documenting the trend over nearly a century, many Republican nominees given the political freedom of a lifetime appointment have become more liberal in their rulings as they age.

To try to break this trend, conservative operatives didn’t necessarily conjure more compelling jurisprudential arguments in service of their ideology. Instead, they built a corruption machine that creates personal financial incentives for Republican appointees to never deviate from whatever that machine wants in any given case. To make conservatives’ demands extremely clear, that machine files endless amicus briefs, or friend-of-the court filings, at the Supreme Court and throughout the federal judiciary.

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The financial incentives are elucidated in the recent spate of scandals at the high court. Indeed, each member of the conservative Supreme Court majority — and all lower court judges aspiring to be the next GOP Supreme Court appointee — knows that if he or she toes the line, there may be big rewards, whether it’s luxury vacations, boarding school tuition and housing for family members, land deals, or lucrative payments to spouses.

The justices also stand to have law schools named for them or make extra cash on the side teaching at those law schools.

The Antonin Scalia Law School at George Mason University, renamed as part of a dark money deal brokered by Leo, has paid at least three Supreme Court justices to teach classes in recent years. In some cases, those classes have resembled all-expenses-paid international vacations — which also happen to come with paychecks approaching $30,000.

It’s not just the high court justices collecting outside incomes at GMU. Douglas Ginsburg, a senior judge on the U.S. Court of Appeals for the District of Columbia Circuit who was once a potential Republican Supreme Court nominee, is on the full time faculty at the Antonin Scalia Law School and has been affiliated with the university for decades.

Ginsburg’s financial disclosures show that GMU’s law school and a university foundation have paid him $350,000 or more annually for years.

Federal judges can also expect to be flown around the country for events held by local chapters of the Federalist Society, the national conservative lawyers network co-chaired by Leo, and have all of their travel and meal expenses covered.

The conservative justices and their brethren in lower courts know that if they refuse to toe the line, those potential rewards could disappear.

And the justices know that if they ever allow a code of ethics to be imposed on them, this lucrative reward system could go away – new anti-corruption rules could bar them from accepting gifts and outside pay. This might be why Chief Justice John Roberts has threatened to challenge or ignore any anti-corruption rules passed by Congress.

But without such rules, those incentives and disincentives will continue to deliver what we now have. The current court is not just the most conservative Supreme Court in a century and completely hostile to what the country actually wants. The high court also displays almost no independence — which is to say, no willingness to ever deviate from the conservative movement’s demands on any case.

This is likely why polls show Americans now deeply distrust the Supreme Court.

Most people now sense that this is not an institution issuing earnest and principled rulings that they may disagree with.

They detect that billionaire and corporate money has hacked the system that was designed to preserve the prospect of judicial thought, independence, and impartiality — the qualities upon which the court’s legitimacy was built.

They see that all that money has bought influence, turning the court into the opposite of an honest broker just calling balls and strikes, as Roberts promised when he was nominated.

They recognize that corruption has turned the high court into the American right’s rigidly partisan and unprincipled political weapon — and without court expansion, it will likely remain that way for the next 40 years.