In fact, local chapters of Tea Party Patriots routinely received early training and support from FreedomWorks, the moneyed libertarian outfit run by the former Republican House majority leader and corporate lobbyist Dick Armey. FreedomWorks is itself a spinoff from Citizens for a Sound Economy, a pseudo-grassroots group whose links to the billionaire Koch brothers were traced by Jane Mayer in her blockbuster August exposé in The New Yorker. Last week the same Tea Party Patriots leader who bragged to the National Journal about all those small donations announced a $1 million gift from a man she would identify only as an entrepreneur. The donor’s hidden identity speaks even louder than the size of the check. As long as we don’t know who he is, we won’t know what orders he’s giving either.

Such deep-pocketed mystery benefactors  not O’Donnell, whose reported income for this year and last is $5,800  are the real indicators of what’s going on under the broad Tea Party rubric. Big money rains down on the “bottom up” Tea Party insurgency through phantom front organizations (Americans for Prosperity, Americans for Job Security) that exploit legal loopholes to keep their sugar daddies’ names secret. Reporters at The Times and The Washington Post, among others, have lately made real strides in explaining how the game works. But we still don’t know the identities of most of those anonymous donors.

From what we do know, it’s clear that some Tea Party groups and candidates like Sharron Angle, Paul and O’Donnell are being financed directly or indirectly not just by the Kochs (who share the No. 5 spot on the new Forbes 400) but by a remarkable coterie of fellow billionaires, led by oil barons like Robert Rowling (Forbes No. 69) and Trevor Rees-Jones (No. 110). Even their largess may be dwarfed by Rupert Murdoch (No. 38) and his News Corporation, whose known cash contributions ($2 million to Republican and Republican-tilting campaign groups) are dwarfed by the avalanche of free promotion they provide Tea Party causes and personalities daily at Fox and The Wall Street Journal.

However much these corporate contributors may share the Tea Party minions’ antipathy toward President Obama, their economic interests hardly overlap. The rank and file Tea Partiers say they oppose government spending and deficits. The billionaires have no problem with federal spending as long as the pork is corporate pork. They, like most Republican leaders in 2008, supported the Bush administration’s Wall Street bailout. They also don’t mind deficits as long as they get their outsize cut of the red ink  $3.8 trillion worth if all the Bush tax cuts are made permanent.

But while these billionaires’ selfish interests are in conflict with the Tea Party’s agenda, they are in complete sync with the G.O.P.’s Washington leadership. The Republicans’ new “Pledge to America” promises the $3.8 trillion addition to the deficit and says nothing about serious budget cuts or governmental reforms that might remotely offset it. Surfing the Beltway talk shows last Sunday, you couldn’t find one without a G.O.P. politician adamantly refusing to specify a single program he might cut at, say, the Department of Education (Pell grants?) or the National Institutes of Health (cancer research?). And that’s just the small change. Everyone knows that tax cuts for the G.O.P.’s wealthiest patrons must come out of Social Security and Medicare payments for everybody else.

They are acing it, these guys. Election Day is now only a month away. The demoralized Democrats are held hostage by the unemployment numbers. And along comes this marvelous gift out of nowhere, Christine O’Donnell, Tea Party everywoman, who just may be the final ingredient needed to camouflage a billionaires’ coup as a populist surge. By the time her fans discover that any post-election cuts in government spending will be billed to them, and not the Tea Party’s shadowy backers, she’ll surely be settling her own debts with fat paychecks from “Fox & Friends.”