Paul Krugman believes that liberals are situationists, while conservatives are dispositionists:
Liberals talk about circumstances; conservatives talk about character.
As a case in point, he suggests that the only way to stop the extremely wealthy from engaging in conspicuous consumption is to stop them from being extremely wealthy:
As Thorstein Veblen told us long ago, in a highly unequal society the wealthy feel obliged to engage in “conspicuous consumption,” spending in highly visible ways to demonstrate their wealth. And modern social science confirms his insight. For example, researchers at the Federal Reserve have shown that people living in highly unequal neighborhoods are more likely to buy luxury cars than those living in more homogeneous settings. Pretty clearly, high inequality brings a perceived need to spend money in ways that signal status.
The point is that while chiding the rich for their vulgarity may not be as offensive as lecturing the poor on their moral failings, it’s just as futile. Human nature being what it is, it’s silly to expect humility from a highly privileged elite. So if you think our society needs more humility, you should support policies that would reduce the elite’s privileges.