Absolutely. The source of most of the corruption I see in the world today is wealth, and specifically wealthy people paying people off to get their own way. If there was less wealth inequality there'd be much less scope for this.
Note: I believe this would be the case even if the money was literally burnt/disappeated rather than being given to the government (not that I suggest that's what we do).
Politics has it's fair share of corruption too. But at least in my country (the UK) it's the lesser evil. And even if you look at a country like the US where there is a lot more political corruption, the source of a lot of that seems to be private money influencing elections.