Who gets to decide which groups "should be ignored". The pig farmers certainly don't agree. The whole point of competitive districts is that the groups who should be ignored will be eliminated by competition. Your whole premise seems to set up all districts with functional lifetime appointments rather than elections.
In competitive districts, politicians are far more dependent on campaign funding. Competitive elections are extremely expensive. So the group that gets ignored is just the group that has the least money to throw at candidates. It's the average person that always loses in that case. That's not fair either.
I would certainly prefer term limits, but if a population thinks their representative does a good job representing their needs - why shouldn't they get re-elected? Nobody is stopping them from having a competitive primary. Remember, AOC only got elected because her district was so non-competitive for republicans, that the establishment didn't bother channeling massive money into the primary for the incumbent. So this setup would actually make it easier for non-establishment candidates to sneak in, and even incentivize the other party to run a non-traditional candidate to compete (ie, like how dems used to win with blue dog democrats in rural areas).
> In competitive districts, politicians are far more dependent on campaign funding.
If we're dreaming big here, how about we try fixing campaign funding too? To give a concrete suggestion, the US should pass a constitutional amendment which allows Congress to limit expenditure on political advertising (but not other forms of political speech). Here is one such approach:
