A counterproposal on the left is to reframe the populist theme and argue that middle-class Americans more generally are locked in a zero-sum conflict with rich people.
Obama and other center-left leaders around the world do not espouse that view primarily, I think, because they believe it is simplistic and wrong. But a crucial vulnerability of center-left politics around the world is that their sincere conviction a faith in the positive-sum nature of cosmopolitan values and appropriately regulated forms of global capitalism, tempered by a welfare state is easily mistaken for corruption. The political right is supposed to be pro-business as a matter of ideological commitment. The progressive center is supposed to be empirically minded, challenging business interests where appropriate but granting them free rein at other times.
This approach has a lot of political and substantive merits. But it is invariably subject to the objection: really?
Did you really avoid breaking up the big banks because you thought it would undermine financial stability, or were you on the take? Did you really think a fracking ban would be bad for the environment, or were you on the take? One man's sophisticated and pragmatic approach to public policy can be the other man's grab bag of corrupt opportunism.