The problem is that raising top end rates don't go far enough. It's a start, but we also need to raise the lower rates to solve the problem. That, or dramatically cut benefits.
I don't think broader tax increases are off the table either, but we haven't even attempted to simply close up the loopholes used by corporations and the ultra wealthy and raise taxes in kind. Once that happens, I think its fair to reassess what to do with any lingering problems of raising revenue.
