[W]hatever one [thinks] should be done with large financial institutions as a policy matter, surely we [can] agree that the executives at these institutions are primarily bad people. ... These are people primarily motivated in life by greed. Not just by a desire to make some scratch, mind you. ... They're multi-millionaires who want to earn millions more. ...

we've lost the willingness to just say clearly that

greedy behavior is not virtuous behavior. In the spirit of decency, of course, we recognize that none of us are without sin.

But the fact still remains that greedy behavior is not admirable behavior and that, as Krugman says, it's very unlikely that the "best" young people were going into finance. And to say that they're not necessarily good people need not entail that they're criminals. Simply the fact that the best people are people who aren't primarily driven by greed.