Doesn't this presume that the structures which prop up the government are already an intrinsic good? Consider the frequently seen sentiment that no matter who i

Doesn't this presume that the structures which prop up the government are already an intrinsic good? Consider the frequently seen sentiment that no matter who is in office, it is the office itself that does not serve the people, the government is not for the people, and the foundations of the government work against the people and will continue to do so even if a ruler is dismissed and another brought in. To use a more crude example, a slave does not cease to be a slave just because he can vote out his old master - rather it is the institution of slavery that must change, not merely adding the ability to choose. This is frequently found in political philosophy that goes well beyond Popper's liberal egalitarianism. It's very strange to see this in the context of a country which is ostensibly (but not actually) democratic, such as China.