Campaign donations and lobbying are a systematic problem, but laying the blame there and only there ignores the fact that there there are degrees of complicitness within a corrupt system, as well as degrees of the impact imposed by the corruption itself. Ultimately only one side of the aisle seems so eager to get in bed with ISPs to destroy the internet, to deny climate change in support of their fossil fuel benefactors, and to dismantle the healthcare system for the benefit of the rich.
Also, ask yourself which party supports citizen United, and which party obstructed any progress on legislative efforts to address it?