We have those coalitions in the U.S., they're just internal to the political parties. If you vote mostly on a single issue, then life is good, find the correct party. However, if you want guns and gay marriage to be equally legal, too bad, there's no party for you.
Functionally the US Democratic Party is a coalition between environmentalists, ethnic activists, health care, labor unions, Hollywood, and of course the gay agenda. Republicans are an alliance of low-tax advocates, farmers, authoritarians, industry and finance, and gun lovers. Generally the compromise part happens as a different base of voters migrates to another party, like the Southern Strategy.
Functionally the US Democratic Party is a coalition between environmentalists, ethnic activists, health care, labor unions, Hollywood, and of course the gay agenda. Republicans are an alliance of low-tax advocates, farmers, authoritarians, industry and finance, and gun lovers. Generally the compromise part happens as a different base of voters migrates to another party, like the Southern Strategy.
"Kitto daijoubu da yo." - Sakura Kinomoto