If he pays taxes then it's partially his money, and he has a right to vote on how it's used and tell people his opinion. Arguing that his idea would be spendin

If he pays taxes then it's partially his money, and he has a right to vote on how it's used and tell people his opinion. Arguing that his idea would be spending "other people's money," is a non-sequitor. Following that logic nobody should have any say in how the government spends money, because no single person is contributing the majority of funding.