tell me, what is a "fair share of taxes"?

If we all pay the same percentage of income to taxes, is that a "fair share"?
Because we have a progressive tax system, which means the more you earn, the more tax you pay (as a percentage and in real dollars).  This is inherently "unfair"... but you think high-income earners should pay even more to be "fair"?

How is that fair?

I suppose we should all make $15/hr and pay the same - that would be "fair" too, right?  

Grow up