Here is my opinion. Romney has paid taxes based on current laws and therefore has done nothing wrong. Just like Pelosi, Reid, Obama, etc.
Why do the "rich" who want to see change so they will pay more have to wait till the tax law is changed. Make a donation to the US today. Bet they don't. So this whole issue has turned politics of left vs right instead of what really needs to change in tax law.
It is also my opinion, everyone should pay something in federal taxes, everyone.