The more people are ruled by a single government that is ostensibly a representative democracy, the less representative said democracy actually is. This should

The more people are ruled by a single government that is ostensibly a representative democracy, the less representative said democracy actually is. This should be rather evident - you can't grow parliament size indefinitely if you want it to continue functioning as a deliberative chamber, which in turn means that every parliamentarian represents more and more people, which in practice means that they don't represent them well.