What does 'one dollar, one vote' mean?
It appears to suggest applying the way shareholders vote in a company to the political setting of democracy: each citizen will have as many votes as his/her monetized wealth. So the rich will have officially "more say" in what gets decided or who gets elected in public office.

Certainly, the general consensus is that economic power does play a role in affecting political outcomes anyway. This approach would make that an official, institutional rule.