Is it normal to want a flat rate tax?

But if you save your money in a bank you arent hording it. Hording it would be stuffing it under your mattress. While a bank will circulate your money through other investments. That's why banks gives you intrest. So it still works in a flat tax system since no money is technically stagnant if you store money in banks. Which you are incentivised to use because of intrest.

Why? Everyone would literally be pulling their own weight. Proportionately. If you wanna save money and not buy things. No tax. But someone, at sometime. Is gonna spend it. And you pay the tax. How the heck is that horrible? Or are you just a freeloader