I wouldn't call it financial regulation, I'd call it theft. Physically coercing a population and taking their resources is a dangerous thing. The parasitic bureaucracy isn't going to do it, they're going to hire some goons to take that risk and exert that force. But that's a game with diminishing returns, because the more you take, the harder people resist, the more force it takes to coerce, the more you have to pay the goons. Eventually it's going to cost a dollar in goon wages to extract a dollar in peasant resources, and there's nothing left over for the parasite class.

The ability to issue credit means the parasite class can extract resources like you say, without leaving their desk, simply by skimming off everyone's purchasing power. This has two advantages. One, it has zero cost, since it's not physical force, so spineless bureaucrats don't even have to hire a goon squad to do their dirty work for them. Two, the amount extracted can be much higher, since most people don't understand who's robbing them, how much is being stolen, or how to protect themselves.

If the government sent a SWAT team to each house and physically took half of everyone's belongings, let's just say mortality rates would rise rapidly. But a government can enforce 50% inflation and no heads will roll.

To your point, Bitcoin removes this "point and click coercion" cheat code, which is exactly why the parasite class will fight it tooth and nail as soon as they grasp the reality of their fate.