That seems like a pretty useless definition of corruption. It implies that retirees writing letters to Congress is "corruption" because working people don't have the same amount of free time to do that.

It's also kind of weird to propose it as an asymmetry. Google's parent company spends around $4M on lobbying in the US:

https://www.opensecrets.org/federal-lobbying/clients/summary...

That's around $0.01 per capita. Your per capita contribution for individuals to out-spend Google on lobbying is two cents.