Earlier quoted context omitted.
First, the number of House reps is no longer proportionate to the population. Yes they are. Each house district has about 750,000 people. You get a bit of deviation because states don't necessarily have a precise multiple of 750k people. Also we only redraw districts every 10 years, so things have drifted a bit since 2010. But it's pretty close.
We should expand the number of reps to 1 per 100k. Would help much of the problems.
If the UK can stomach well over 600 MPs the so can we.