Stumpokapow
listen to the mad man
I don't get this. I was going to say as a member of UKGAF, but then I look at the Labor party here and I realise this is a similar story playing out here and I don't get it that either.
Party division is becoming a real problem, something that could be sorted out if you disbanded the 2 party system in the US and the three party system in the UK. (I am aware that it's not really a three party system in the UK, but aside from the the Big 3, you don't have much choice.) Put a cap on the amount of members in any party. Split them. Seems like the easiest solutions. Someone more informed please tell me reasons as to why this is bad idea?
Well, for one thing, there's one Presidency, so only one party can have it at once, so under your system, there'd just be a Democrats 1, Democrats 2, Democrats 3, Democrats 4, etc. which would all support the Democratic presidential nominee. Mathematically, under the spatial voting assumptions, if there are three parties, then the two closest parties to one another undermine each other. This scales. The game theoretic optimal approach in a winner-take-all situation is to have two competitors. Presidencies are not parliamentary systems.
The reason a third party can exist in the UK (or in Canada or...) is because parliamentary systems are not winner take all. In these systems, each constituency is incentivized to be a two-party constituency (which is the case: how many Scottish constituencies have Labour, SNP, and the Tories all being competitive?) So FPTP creates local incentives to be two-party but can sustain regionally strong third parties for a while.
You can look up Duverger's law to read more. And while there have been reasonable criticisms of Duverger's law, none of them disagree with the above.
Setting aside game theoretic concerns, it's also obviously unconstitutional. A breach of free association and free assembly. And it would not be sustained as a minimally intrusive way of achieving a public policy outcome.