Oculus Gear ? ? Dont found it <| sep |> If you have STV with 3 seat electoral districts , a party could get 10 % of the national vote and still have zero representation in Parliament . So first of all , what fully proportional means is that in a 3 seat district , a party with 33 . 3 % of the vote is guaranteed 1 seat . MMPAMS doesn ' t guarantee that . You could just as easily have your scenario happen under 10 seat AMSMMP and by just as easily I mean not very easily it ' s never actually happened in STV . Suppose you have a district that is 11 seats 7 local , 4 regional . Party A wins 35 % of the local vote and sweeps all 7 seats on small margins . So Party A has 40 % of the vote and 64 % of the seats . Not a great start . The other parties have support as followsB has 19 % C has 16 % D has 14 % E has 10 % F has 6 % G has 2 % So the proportional result using the Droop quota can use a different one if you prefer isA 4 seatsB 2 seatsC 2 seatsD 2 seatE 1 seatFG 0 seatsTrouble is that A already won 7 seats , not 4 , so those 3 extra seats have to come from somewhere . That turns it in toA 7 seatsB 1 seatC 1 seatD 1 seatEFG 0 seatsThat fictional area has a name by the way South West Wales . I had to massage the numbers a little , but in the real world case the Lib Dems did lose out on getting any seats despite 7 % of the vote . BTW , the Greens in Ireland won 2 . 7 % of the vote and got 2 seats out of it . One of those two seats was won by Catherine Martin , who took a seat in the 3 seat district of Dublin Rathdown with 10 % of the vote . Transfers from other parties particularly Sinn Fein , Labour and their old coalition partners Fianna Fail did the rest . D % C 3 % A 1 il % C 3 % 89 ireannconstituencyThe whole idea in MMP is that a party ' s percentage of the popular vote should be reflected in their seat share . The deviations from this under Scottish MMP are typically larger than under Irish STV . If it ' s done the way it ' s been done traditionally in the countries that use it the system would still be extremely distortionary . Could you tell me where this talking point came from by any chance ?