Here's what i have learned. When Jesus was asked if they should pay taxes to Caesar, Jesus's answer was quite clear. The first thing he did was ask who's picture was on the money. When they answered that Caesar was on it, Jesus recognized and acknowledged that Caesar was the earthly authority on the money, which he wouldn't override because it was what his father allowed. So he was saying submit what you are supposed to under earthly law in order to exhibit your honoring of the godly concept of authority, and whatever increases are left for you, you tithe from that, because you are responsible for the increase you receive in hand. (Matthew 22:15-22). While it is not a pleasant command, it is a command. Each authority is responsible for what they do with what they collect. You cannot hinder the authority from collecting taxes, though you can control what they collect in certain circumstances. You can completely control your net income and that is what God holds us responsible for. Several of the stewardship parables reveal this.
Also, notice the order of his answer:
Give Caesar his due, then give God his due.