1. You are applying a generalization to one very specific government organ.
2. If there was no sin, there would be perfection, and no death. If there was perfection, there would be no uncontrolled fires, and no death or destruction of property from those fires. There would then be no need for a fire department. Disorder/danger proceeding from sin is controlled by this government arm.
3. If you doubt the government mandate to restrain sin and preserve order, here's the appropriate text from Romans 13:1-7:
Everyone must submit himself to the governing authorities, for there is no authority except that which God has established. The authorities that exist have been established by God. Consequently, he who rebels against the authority is rebelling against what God has instituted, and those who do so will bring judgment on themselves. For rulers hold no terror for those who do right, but for those who do wrong. Do you want to be free from fear of the one in authority? Then do what is right and he will commend you. For he is God's servant to do you good. But if you do wrong, be afraid, for he does not bear the sword for nothing. He is God's servant, an agent of wrath to bring punishment on the wrongdoer. Therefore, it is necessary to submit to the authorities, not only because of possible punishment but also because of conscience. This is also why you pay taxes, for the authorities are God's servants, who give their full time to governing. Give everyone what you owe him: If you owe taxes, pay taxes; if revenue, then revenue; if respect, then respect; if honor, then honor.