Here's a good question: is it insulting to whores

to call a politician such?
Congress is nothing like a prostitute. A prostitute only wants cash that customers actually have, and usually tells them the real price of the services being purchased. A prostitute doesn’t impose hidden fees through inflation (we don’t generally give prostitutes the power to print money, but somehow we let Congress approve stimulus packages and spend money that doesn’t exist). A prostitute doesn’t increase the national debt (in fact, it is government, by keeping prostitution illegal, that increases the deficit in yet another way, by making income from prostitution outside of the system and not taxable).
True. Though both lots of prostitutes and politicians carry social diseases, just different kinds.

Added: from Joe in comments:
You missed the most important differences: prostitutes don't charge you for services rendered to somebody else, and they don't send armed agents to your home if you choose not to do business with them.