"Everyone must submit to governing authorities. ... Pay your taxes, too, for these same reasons. For government workers need to be paid. They are serving God in what they do. Give to everyone what you owe them: Pay your taxes and government fees to those who collect them, and give respect and honour to those who are in authority."

(Romans 13.1-7 NLT)

Many people in authorities are selfish, unfair, greedy, evil, or corrupt. There are many countries with those types who rule their countries. What do Christians in these countries do?

Paul wrote clearly earlier in his letter. “Never pay back evil with more evil. Do things in such a way that everyone can see you are honourable.” (Romans 12.17 NLT)

It is not easy. May God help me.

Related:
Chain reactions
Looking the other way
Those in authority
On enemies (3)