You might be able to work with that. Cap the salary at twice minimum wage. There are far more poor people than wealthy people, and running for office would be both attractive for them financially, while making it unattractive for the wealthier of society. It wouldn’t solve the problem of Bush Jrs or D. Trumps (the wealthy who inherited, but have proven incapable of making money themselves), but those people will always be a pestilence.

A concern might be that poor people will be easier to bribe, but I’ve seen no evidence in my life that being rich is a prophylactic against being crooked, so maybe it’d be OK.