Getting rid of MMP - a tally that tells.

United Kingdom.

Population 66,000,000 and represented by 650 MP's - each MP representing 101,539 people.

Australia.

Population 26,000,000 and represented by 151 MP's - each MP representing 172,865 people.

Aotearoa NZ.

Population 5,120,000 and represented by 120 MP's each MP representing only 41,667 people.

If we were to match both Aussie and British population to MP ratio, we'd need only 50 MP's.