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The Trump administration’s billionaire commerce secretary Wilbur Ross owns a stake in a shipping company that does large amounts of business with another firm partly owned by Vladimir Putin’s son-in-law and a Putin ally sanctioned by the U.S. government.

The Kremlin plowed millions of dollars into U.S. tech firms Facebook and Twitter, through a Russian intermediary who also invested in a real estate fund run by President Trump’s son-in-law and White House adviser Jared Kushner.

The disclosure of the Paradise Papers spotlights an open secret of the modern economy: A large and growing share of the world’s wealth is hidden in a network of offshore tax havens that directly links the world’s wealthy, powerful, and politically connected.

READ: Everything you need to know about the massive Paradise Papers leak

Estimates of the size of this parallel economy are staggering. Roughly $7.6 trillion in financial assets, 8 percent of the world’s total, is secreted away in tax havens such as Switzerland, Luxembourg, the Cayman Islands, Singapore, and Bermuda, according to University of California, Berkeley economist Gabriel Zucman’s 2015 book “The Hidden Wealth of Nations.”

There’s considerable variation in exactly how much wealth is hidden by residents of different countries. The rich in the Gulf States and Russia are the worst offenders, with roughly 57 percent and 52 percent of financial wealth, respectively, kept in tax havens. Zucman’s estimate for the U.S. is roughly 4 percent.

And the very existence of such wealth has far-reaching implications. For one thing, it means that the wealth inequality that has grown in recent decades is likely much worse than it currently appears on paper, as significant amounts of wealth are not included in calculations of wealth inequality, which are based on reported taxes.

It also means the U.S. Treasury is missing out on roughly $35 billion in revenue annually, Zucman estimates in his book. (In fairness, for the U.S. that’s not as large a problem as corporate tax avoidance, which cuts U.S. tax collections by roughly $130 billion a year.)

But in a world where the wealthy are increasingly central to the political system, there are also corrosive political implications to personal tax avoidance, as details of the Paradise Papers make plain. At best, those undisclosed business alliances present serious conflicts of interest as politics around the world is increasingly dominated by the richest members of society. At worst, they create the infrastructure for outright corruption, especially for a Trump administration replete with billionaires and multi-millionaires.

In part, this reflects the changing nature of world inequality. According to Branko Milanovic, an economist who studies inequality around the world at the Graduate Center of the City University of New York, in the past the world’s rich and poor were largely determined by which countries they lived in. Compared to the world at large, Americans were by and large rich. Chinese were, by and large, very poor.

But today, inequality is driven by the differences within countries. In other worlds, the richest in China, Russia, and the Gulf States have far more in common with one another than they do with the average worker in their own country.

By hiding their wealth, America’s richest are effectively entering into a quasi-legal underworld — an exceptionally polite and well-dressed underworld that relies on well-compensated attorneys and tax consultants. That puts them in close contact — given the small numerical size of the global 1 percent — with the dictators, political cronies, quasi-criminal organizations, and outright gangsters who also avail themselves of tax evasion services.

Given the outsized political influence of the 1 percent — and in the case of the Trump the large role the demographic specifically plays in the administration — there’s a high risk of conflicts of interest, if not outright corruption.

The disclosure of those conflicts also risks further undermining respect for democracy, which already seems to be waning. Polling shows Americans’ trust in the government continues to hover at near-historical low of roughly 20 percent.

For their part, the rich whose business dealings were outlined in the Paradise Papers have said they’ve done nothing wrong, and all of their dealings were lawful. And that might be true.

But then again, they’re rich. They’re the ones who are making the laws.