A few days ago, Paul Krugman wrote that there has been a vicious circle in which rich people influence government policy to favor their interests, which allows them to get richer, which gives them more influence..... This post will mainly be about the political side of his story, but I'll start with a few points about the economics. The figure shows a general measure of income inequality over time:
It grew from the 1970s to the early 2000s, but has leveled off. What about wealth?*The share of the 99.0-99.9% peaked in 2018 and is now about where it was in 2009, but the share of the top 0.1% has continued to increase and is higher than ever. So although you could argue about whether "inequality" is increasing, the very rich have been pulling ahead of the rest of us.
Krugman presents a figure showing the decline of corporate tax rates since the 1940s, which he says is a major cause of the gains at the top. He says that the decline of corporate taxes reflects the power of the "oligarchs," and have happened "in the teeth of very broad public opposition," and points to a Gallup question about whether corporations "are paying their fair share in federal taxes, paying too much, or paying too little?" The last time that was asked (2025), 21% said fair share, 7% too much, and 70% said too little.
However, although agreement that corporations are paying too little in taxes may be broad, I don't think it's very deep. First, when you mention specific rates, there's less support for an increase. In 2021, an ABC/Washington Post survey asked "The top tax rate on corporate profits used to be 35 percent, then was cut to 21 percent. Would you support or oppose raising the corporate tax rate to 28 percent?" 58% were in favor and 36% were opposed. That's a majority, but the question isn't even about returning to how things were, just going halfway back. There aren't many other questions that specify rates, but back in 1986, Harris asked about raising the minimum rate to 25%: 61% were in favor and 33% opposed. However, in 1985 a Business Week/Harris poll asked about "A gradual reduction of the maximum corporate income tax from 46 percent to 35 percent," and opinions were almost evenly divided, with 42% in favor and 47% opposed. Second, in 2011 a CBS/New York Times survey asked "If you had to choose one, which would you prefer in order to reduce the federal budget deficit--raising taxes on corporations or cutting government spending?": 32% favored increased taxes on corporations and 64% favored cutting government spending. As far as I know, this is the only question of its kind, but there's lots of evidence suggesting that people think that there's a lot of room to cut spending without losing services. Third, strong majorities say that the middle class pays too much in federal taxes. Putting these points together, the usual Republican package--cuts in corporate taxes combined with with smaller cuts for middle-income people and vague promises of savings by cutting waste, fraud, and abuse--can be fairly popular. On the other side, when Democrats propose increasing taxes on high-income people and corporations, people may suspect that the increases will wind up applying to them too.
Finally, here's a summary of the Gallup questions about taxes on high-income people, middle-income people, the poor, and corporations. The numbers are percent who think the group pays too much minus the percent who think they pay too little:
Although federal taxes on corporations and upper-income people have declined over that period, public opinion hasn't moved towards saying that they pay too little: in fact, there's been some movement in the other direction.
So overall, I think that policy doesn't reflect the strength of oligarchs so much as the weakness of popular support for high taxes on anyone, even rich people and corporations. This doesn't mean that Democrats shouldn't try to increase taxes on rich people and corporations--just that such attempts won't be especially popular. Public opinion is likely to be pretty evenly divided, as it was with the Clinton and Obama tax reforms.
[Data from the Roper Center for Public Opinion Research]
*Data from the Federal Reserve