If your vote is as powerful as you claim, then explain to me how the wealth disparity has increased over time, and that most politicians weren't complicit in that process. Your politician allies are not your allies. Do you think it is difficult to lie to constituents and double-deal, especially when all of your peers are doing the same?
You were asking how to make those spending your money accountable (be it by spending your taxes or saved money through deductions or lower or absent taxes). You were seeking control, and I explained to you how and where you have it.
You implied that democratic control over your taxes was not enough. I wanted to point out you have far less control over how people who don't pay tax and who you don't elect. I am glad you now agree that democratic control is an altogether preferable situation than letting billionaires spend their money undertaxed as they please.