Cmv i believe people in government with substantial power (congressmen, president, governors) should not be allowed to have non essential possessions if there is to be a non corrupt government.:
Almost all problems seen today (and throughout history) with corruption in government is that we allow them to be bought with their own personal desires and selfishness. If we don't allow them to have the possibility of wealth, then we can put a stop to a lot of corruption. 

If a rich businessman gets into politics, he should give up all money and all other non-essential things. This will prove he isn't in it for the money, but for the actual job.

I know chances of this being implemented are slim, don't use that as an argument.   