That shouldn't be denied, though some people strenuously deny that society, or specifically government, provides much benefit to those who are trying to make a living. That's hogwash, of course. The rich are not self-sufficient. They rely on the commercial marketplace, public roads and utilities, customers, property rights enforced by police and courts, etc.
It would be good if those who say that 'the rich owe society' show that they aren't planning to go down that slippery slope, because that is what will pop into the heads of a lot of people if they don't address the issue.
Perhaps it would be more palatable to talk in multiples of the usual payroll tax. I personally think that having highest earners paying income tax at a rate of 5 times the usual payroll tax doesn't sound terrible, especially if you quantify the other brackets too: 1.5 times the payroll tax, 2 times the payroll tax, 3 times the payroll tax, etc. (Note: I say the usual payroll tax to account for the Social Security tax rate cut we're currently having. Any tax holidays for payroll taxes shouldn't apply to the income tax rates.)
The best way to reassure taxpayers that you aren't out to soak the rich is to support a broad, fairly flat income tax structure. But that means committing to tax reform because our current tax structure isn't very flat and contains all sorts of loopholes for the wealthy and not-wealthy to reduce their tax burden. It also means being committed to finding ways to rein in spending, including entitlements. Because if you don't rein in spending (and growth in entitlements are the largest automatic spending hikes), then the US taxpayers know that you're going to be soaking the rich sooner or later.
So here's my declaration: I believe in the rich paying their fair share, and everyone else paying theirs too. And I'm not afraid to quantify what I mean by 'fair share.'
My proposed tax rates