plurality-based systems where local member or members can be elected with only a plurality of votes, such as Block voting or single-winner FPTP, allows the leading party to win seats more affordably than the other parties do.
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BC 1933-1949
Under BC's mixture of Block voting in MMDs and FPTP in single-member districts, votes were weighed unequally in historic BC elections, with Liberals then Liberals and Conservatives getting the benefit, versus opposition parties
COST IN VOTES TO GET A SEAT
government party opp. parties
1933 Lib maj 42 pc of vote 4547 17,083
1937 Lib maj 37 pc of vote 5035 15,403
1941 Coalition Lib 7100 10,939
Conservative 11,690
1945 Coalition majority 56 pc of votes 7254 18,782
1949 Coalition majority 10,802 33,220.
so you saw under BC's district-plurality based system, Liberal or Lib-Conservative Coalition getting each of their seats with fewer votes than the CCF, Social Credit, Communists and Independents time after time.
likely this result has not changed in BC since 1949, even afr change to strictly single-winner FPTP in 1990.
basic stats from Glashan PR in Canada 1951 available online, with supplemental info from Wiki article for each BC election
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