Just look at how stupid people with an IQ of 100 are and then realise that half of the population is more stupid.

I think many people actually believe that if you take money away from "other" people, like refugees or people on welfare, that money will be funneled to them. It's a zero sum game, sure, but the flow of money is always upwards. Recent evidence would be tax cuts for companies (which of course only affect companies making profits and not the many struggling companies in the industry sector and much less so any actual working people).