Exactly. Seems to me it would be more plausible for a candidate without deep pockets backing them to be able to run a competitive campaign on issues the distric

Exactly. Seems to me it would be more plausible for a candidate without deep pockets backing them to be able to run a competitive campaign on issues the district cares about. Simply because they could just go around knocking on doors. A candidate and nine helpers each talking to 100 people a week for ten weeks could theoretically cover the entire district. Not to mention being able reach a good chunk of them by just hanging out at a local grocery store or visiting local bars and other hotspots. Throwing money at a hotspot race would have rapidly diminishing returns compared to a race with several hundred thousand people who can only be reached in numbers by broadcast ads or a truly massive campaign force. EDIT: Although I suppose the tactic could at that point be turned to buying voters more directly. Spend a ton of money on something that benefits everyone in the district and make it clear that it'll keep coming only if they vote for your candidate, and you might have the same effect.