So a presidential candidate doesn't have to be as transparent as a cabinet appointee?
Yeah there are a lot more important issues out there, such as: Obama is a muslim. Obama is a Kenyan. Obama hates white people. Obama is a socialist dictator.
As long as Romney refuses to release his taxes this one will not go away. The longer he waits, the more suspicious people will get. And it is not irrelevant. If Romney indeed did not pay any taxes for a decade while making hundreds of millions of dollars, it shows a need to reform the tax code.