The money that goes into lobbying in order to have that say is, depending on who you ask, corruption. I, as a random citizen, don't get the same say that a multi billion dollar international corporation does.
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:
