That's not true, in a democracy you tend to have methods of appeal that actually work, and their threat keeps the wheels of bureaucracy greased.

This is because, in principle, everything comes down to the fundamental threat that the people can remove the current government, and the government does have full control over the unelected civil servants. If they keep ignoring appeals, they'll eventually get dethroned.

There's a nice symmetry between this and the fact that the law is ultimately guaranteed by the governments monopoly on violence. They can dethrone you too if you don't comply.

When a democracy works, there can be a very effective balance between the people's leverage towards the government and the governments leverage towards the people.

In an authoritarian regime the same forces are present but they are not balanced in the same way. The people can still rise up and dethrone the ruler through violence, but that is so much harder, and it is mostly offset by the governments greater power of violence. So they can get away with so much more.