The government or any other large institution will never side with you over the wealthy. There may temporarily be exceptions where political power ends up in the hands of a few people who previously weren't wealthy and powerful. When that happens they will quickly use their political power to amass wealth befitting their status.

Liberal institutions and ideals can partially ameliorate this issue, but even in the best case scenario expecting billionaires to pay taxes just means that you fundamentally misunderstand the basic nature of the world you inhabit.