> Once I earn the money it is my money and no longer taxpayer money. I fund the union with my money. The union does not receive money apportioned by the government.
You can't have it both ways. If it's the employee's money, they have the right to do what they want with it, whether that means giving a portion to a union or keeping it for themselves.
If they don't have that legal right, then the money isn't theirs, and it's coming from taxpayers, because it's paid by the government.