Phew, just a minority in the US then that doesn't digest a whole comment. I was worried!

I think you have it backwards. The states should be given more power, and possibly broken up. There's no accountability once your number of constituents exceeds about 1M people.

No, that duplicates fixed administrative costs, requiring more government.

I think you're going the wrong way with this.

The problem is that there are too few representatives and so they can build collations that explicitly exclude your interests while still representing you.

I think it would be much better to have some dual-system to send representatives to congress where you could either Vote or Petition to get a representative. If you Vote its basically the same as currently. But if you Petition you and ~150k other people do not get to Vote but the person you're petitioning for is your representative.