The pie doesn't get larger when one group garners a larger piece.
The pie gets larger when the economy becomes productive.
The pie is not fixed regardless of the size of each slice.
If I make more than Obama feels is "enough", the pie doesn't shrink for the rest of the country.
The slice of everyone else's pie at a fixed point in time must shrink if your slice grows.
People don't live in a fixed point in time, and that makes your statement moot. The pie is ever changing, and the only thing constant about that pie is that government, at every level, continually increases the size of their slice, even thousgh government has never contributed to building the pie.