Every system is corrupted, I think. Meaning, that people can be corrupted, either through what is called major sins (pride, envy, wrath, greed, lust etc.) or through their life being threatened or they being blackmailed.
Have you ever been tested yourself? Were you, let's say, in a position where you were offered a privilege but in order to be given it, you needed to do something in exchange which went contrary to your principles? And where you said "no"?

To be in a responsible position makes you constantly the target of many people and interests. The more responsibility you carry, the more people will try to influence or manipulate you.

The governed as well as the governors need to be in full knowledge of the principles of not sinning and need to be tested.
Someone must be of high integrity to withstand and he must be a very mature combined with skill in his expertise. Without being tested you never know how strong you are.

corporal punishment is highly susceptible to be misused

True. Misuse is a widespread phenomena.

To have the full picture, one would need to know about the amount of the correct use of the law.

Naturally, if you belong to a group or clique, you'll be less inclined to have one member of it to be convicted of a crime, in particular, if this person provides the others with both financial and reputational benefits. That does not excuse it but it does explain it.

Government has actually no power over its many peoples. Since there are not enough resources to have each and every single one under control. So what a determined government does, if it wants the people to obey, is to make people themselves the force; ergo people controlling people on an individual basis. To divide them amongst each other. Fear is a powerful 'weapon'. If the people fall into fear, they are easy to be managed.
Other deadly sins the bible calls out, are inertia and gloom, things which make people ignorant towards what's going on.
Each and every trait can be found below and above. To master life under the human conditions is not easy but difficult. To expect it to be easy, is a whole other chapter.