This is true, and that's why it's very important that the government try to keep the inflation as low as possible. That plus taxes on corporate earnings, capital gains & property. If your government isn't pro low inflation, you simply need to vote for another candidate.

It's very important that the government have no say about the supply or value of the currency to begin with, so as not to distort the functionality of the real economy, whereby all value is produced. The best defense against excess wealth being extracted from the working class by the capitalist class is pitchforks and torches (and a metric fuckton of AR-15's doesn't hurt too), and the lack of a state subsidized by taxes to stand in defense of said capitalists. When you have to actually pay to defend against an angry mob, you have motivation to keep them from getting too angry in the first place. Meanwhile, when the wealthy are looking after the interests of the working class and providing real value to the economy through entrepreneurship and capital, the working classes have motivation not to rise against them. The state is a cancer.