Institutions can be established. I like DOGE. Imagine if DOGE was in the constitution and had real teeth, forcing strict limits on all aspects of the government. Without something like that, government is hard to constrain.

American government is pretty well constrained compared to other western nations because of the American spirit of right-wing Americans. But you and I may not think it is constrained nearly enough.

I"m not sure non-debasable money prevents governments from becoming bohemeth parasites. Imagine gold was in use. Government can still tax at 65%, and physically take your gold at gunpoint.