Well, maybe we'd only do it for candidates? I mean, the chances of not finding a party or being able to found a party with enough like-minded people are pretty slim.
Wouldn't it be impossible to found a new party as a new member? You would have to break off from a party you belong to because you can't start off not in a party. I would say mandatory parties is a little...unnecessary. Party membership helps anyway, so people tend to end up in a party.
I'd agree that mandatory parties is overboard. There was a time when I first joined when parties were utterly meaningless. The rise of the RPP & SDP as well as the renewed strength of the JCP has led to much stronger party structures without them becoming suffocating. It helps to be amember of a party, but people can still succeed without being one.