Are you going to turn him down when he is willing to help you out?
Absolutely.
Are you going to turn him in?
For sure.
Are you not going to vote for him in the next election?
Not a chance and it will have nothing to do with whether or not I get a tag it will be because the Treasurer you described is corrupt.
BTW, because others act without integrity or are dishonest is not justification for doing the same. That's just an excuse.
Also,it'snot "dumb" (how insulting) to conduct yourself ethically and to do the right thing and those that do are not naive about how the world works either. Ethical people will make ethical choices regardless of what others are doing. They follow their concience not the crowd.