That is an internal change within party structures and party co-operation. That's more of a cultural change than I think an electoral system change.
I do think that changing the electoral system could help if you forced everyone to get along, co-operate, and work together. I think then you'd probably see more of a shift.
Let's talk about history for a second. Canada and the U.K. have traditionally never had to have parties working with each other, and that's in Canada more so than in the U.K. I think the U.K.'s first minority government in a long time was in the last election they had, even before this one—