Petition Truly Representative Voting: How it Should be Done

I propose a new voting system in which MPs are awarded varying 'voting points’. The system rewards MPs for having a large proportion of their constituency's vote as well as for representing more people. A grossly oversimplified example follows. (Assume that a country consists of only Constituencies X and Y.)

Constituency X:
Party A receives 54% of the vote, Party B receives 46%.
Party A's MP wins and represents 120 people (pop. of Constituency A).

Constituency Y:
Party A receives 20% of the vote, Party B receives 80%.
Party B's MP wins and represents 80 people (pop. of Constituency B).

VOTING POINTS:
Calculated by multiplying percentage of vote in an MP's constituency by the proportion of the entire population that they represent;

X: 0.54*(120/200) = 0.324 voting points for MP A.
Y: 0.80*(80/200) = 0.320 voting points for MP B.

MP A has (slightly) more of a say in the House of Commons. We must get away from the idea that 1 person should always equal 1 vote.