The big influences are large companies and we finance many of them with the purchases we make. Voting with wallets, given strength of numbers, could start to have an impact.
I don't see reduced tax income changing the ratio in which a government allocates their funds.
Companies are paying taxes too. If you stop purchasing products from one company, government would simply go and tax the hell out of the one you chose instead. It's the wrong way to tackle this problem.
I'm not talking about disrupting the payment of taxes (which I don't think is the issue), but the inequality when it comes to influence. I think influence is one problem that could at least be addressed with public cooperation. Fewer 800lb gorillas.
I don't see reduced tax income changing the ratio in which a government allocates their funds.