All money left in a candidate’s campaign funds after the election should go to the public treasury.
No more of these money laundering campaigns.
I’d go a little farther. All campaign money, from any source including a candidate’s personal bank account, should be divided equally among all candidates in the election. After the election, all remaining money to go into escrow until the next election for that office. Nobody gets to keep a penny for themselves.
No more Bloombergs buying a billion dollars’ worth of ads unless every other candidate gets the same amount.
It’ll never happen, but I can dream.