Comment by returningfory2

I think right now that's not as much of an issue as the 80/46 numbers suggest. If, say, the Democrats had 80/100 votes just from representing that 46% of the population, that would be bad. But that's not how the two parties distribute right now. Big states can be Democrat (California, New York) or Republican (Texas, Florida). Small states can be Democrat (Vermont, Delaware) or Republican (the Dakotas).

The Republicans do end up with a small (up to 5%) advantage in the Senate but that's it. Nothing remotely close to the Labour party getting a near supermajority in the Commons from 34% of the vote. It's simply much much worse in practice than the situation in the United States.