This is not simply a US argument - the UK has a two party system too for exactly the same reason. For the benefit of non UK people who might not know, there is shortly to be a referendum in the UK whether to switch to Av voting (i think thats the official name). Instead of just marking one candidate you rank them 1,2,3,4 etc for however many you want. On the first round the one with the least votes is knocked out and their votes transferred to the voters next preference... until someone has 50% or more.
Personally, the first time I met this system I wondered why on earth it was not used in national elections. It is not full proportional elections, but it counters one of the big objections to a fully proportional system, that people do not end up with a local candidate responsible for your area. It can sometimes be a good thing if an election is decided on local issue and you get someone who will fight for that.
The reason it is not used is obvious. In the UK the next prime minister will be chosen by a few thousand or few hundred thousand people who pick the leader of whichever party wins the next election. (voting systems vary but it is just party members who will choose). no one stands a chance of being part of a government unless he joins one of the two pruvate members clubs which run this country. There are a few other private clubs which might be able to get you into parliament but as a private citizen you have no chance. In theory if I got 50,000 people to support me I ought to be entitled to a seat in parliament. Maybe I become known for some issue and I could get 1,000,000 people to support me nationally. But would I get a seat in parliament? nope. Now if i joined one of those clubs and agreed to follow their line, they would supply 30,000 people to support me and I would be in.
Personally, the first time I met this system I wondered why on earth it was not used in national elections. It is not full proportional elections, but it counters one of the big objections to a fully proportional system, that people do not end up with a local candidate responsible for your area. It can sometimes be a good thing if an election is decided on local issue and you get someone who will fight for that.
The reason it is not used is obvious. In the UK the next prime minister will be chosen by a few thousand or few hundred thousand people who pick the leader of whichever party wins the next election. (voting systems vary but it is just party members who will choose). no one stands a chance of being part of a government unless he joins one of the two pruvate members clubs which run this country. There are a few other private clubs which might be able to get you into parliament but as a private citizen you have no chance. In theory if I got 50,000 people to support me I ought to be entitled to a seat in parliament. Maybe I become known for some issue and I could get 1,000,000 people to support me nationally. But would I get a seat in parliament? nope. Now if i joined one of those clubs and agreed to follow their line, they would supply 30,000 people to support me and I would be in.