I’ve been wondering the same about a lot of right wing economic policy. Why push for policy that is a net negative for everyone in the long run? I have since realized that it does make sense if you don’t look at it in terms of wealth, but rather in terms of power. The control you have over other people doesn’t depend on your absolute wealth, but rather the relative wealth you have compared to others, and so for someone looking for that kind of power (i.e. most billionaires as far as I can tell) it wouldn’t matter if something they do hurts everybody, as long as it hurts you more than it hurts them.