Yes, Millionaires need to pay a higher share of their income than do poors. End of discussion.
Actually in a thread I created a few months backed up with data, the US has the most progressive income tax structure in the world - in fact the most progressive tax structure period in the world. It is the middle class that is the most dramatically "under-taxed," relative to other major industrial democracies. But then you already knew that I suspect. This stuff about repealing the Bush tax cuts for the rich, or whatever the F Obama wants now in his new incarnation, is just noise. Maybe it is a fairness issue for some, but it certainly isn't very fiscally relevant.