Not only would there be much more accurate representation, and much more accountable representation, it would also be much more difficult to bribe enough
Whether there are 8,000 of them, or 400, that dynamic isn't going to change.
Also, at the moment the problem isn't bribes, the problem is that the tail is wagging the dog, and the Party will destroy anyone in it who dares to push back on the glorious leader.
If we went back to campaigns being funded by individuals, the pandering to mega-corporations would be significantly reduced. Since wealth disparity exists, it still wouldn't eliminate the influence of wealthy donors but without corporations being able to effectively purchase elected officials, it's likely that wealth concentration would also be reduced.
A proper constitutional amendment would ban corporations from political speech and donations and ban individuals from using more than X dollars towards a political campaign or PAC or commercial, dollar adjusted by year. That way, corporations are out of the picture altogether and the rich can't just self-fund political campaigns and ads.
Of course, that'll never get past Congress much less a bunch of state houses.
For some reason, you never really get some field of a thousand flowers of unique political insights blooming.
When given the choice between opposing Trump and making bad choices in governance, the people who did the former all lost their jobs, while the people who did the latter were all rewarded.
And that's how you get the current congressional crop.
