the more money a team has to spend - the more non NZers they will get
Easy enough to put rules in place about that sort of stuff.
Of course, you'd need a national body prepared to impose rules and police them.
Aren't you then just paying the same players more to play? Not sure how that would improve things significantly unless you can get guys to go full time which isn't going to happen. Maybe you would get a few more out of towners down to Otago which would make them more competitive - but in the long term I just think the local league is to weak to put together a winning side