Humans are sinful.  This means they often hurt and exploit one another.

How does a Christian deal with the problems that arise in society as a result of human depravity?

One common response is to recommend civil government.

I think it is right to recommend civil government on the basis of Romans 13 and other passages.

But this involves faith, not some deduction about human depravity.

Because depravity affects the civil magistrate as much as anyone else.

The civil magistrate is not an angel but a man.

Giving a person lethal power to use on other people is not self-evidently a solution to human depravity in society.

But one might see that human depravity would give rise to gangsterism, and that the best strategy for Christians would be to recruit/disciple/convert the most powerful gangster.

Also, Augustine never mentioned that an emperor could probably guarantee safe passage to ships that paid him protection, whereas a sea infested with smaller pirates would simply be unsafe.

But this works better the smaller the ruling class.

The only way the civil magistrate can really improve society is if the ones holding office are of better character than those they rule.

What if “the civil magistrate” is several bureaucracies of thousands of people?

How does one ameliorate the problem of human depravity by giving lethal power to a giant corporation with revolving officers?