Yes if that were the case, you'd be right. But that's not the case. The Republic only sets people free from the bondage that has been put on everyone by governments. Like no income taxes, no property taxes, no victimless crimes. So with freedom comes responsibility for your own actions. You are in charge of your life, not the government or anybody else.
And politicians aren't going to be making a lot of money while in office. There will be no lobbyists or huge retirement plans or special treatment while in office. Politicians will simply serve the people for a while and then go home and be a people again. The politician will go back home and be a farmer, mechanic or doctor again. If you allow big money into the political arena, you will have career politicians like we have now. If you don't pay them enough money, you will have them trying to making deals on the side to "make it worth their while", while in office. So the pay has to be just or you have problems on both ends of the spectrum. So no one is going to be becoming rich as a politician.
When I said financing, I meant to simply get enough money to operate the government. And it's not going to be a swift change from the current system we have now. It will take a few years to convert back to a Republic. There are still MANY people that rely on government money.
Also regarding what you were saying about Jesus' return or the accession, check out this video. Move the little time ball to the 2 hr mark and listen. This guy is an ex navy seal who was on the in on the top secret programs involving looking into the future among other things.