Of course they do. But "lower taxes on ordinary people by defunding corruption" is a very different proposal than "sustain funding for corruption by raising taxes".

Indeed. Once is a great idea for the vast majority who don't benefit. The other eventually leads to gradual collapse or violent revolutions.

The amount of money given by companies to congresspeople to save on taxes is necessarily lower than the amount of money not paid in taxes by doing so. I would be surprised if the return was less than 10x.

The amount of money given by companies to congresspeople to pass corrupt spending programs that enrich the companies is necessarily lower than the amount of money spent on those programs, too. Nobody expects that members of Congress would get all of the money. But they're not meant to be getting any of it, and the fact that they continue to implies that the corruption is ongoing.