So firstly that's an impossible way for a club to go broke. They are funded to the turn of 15 Million, with a salary cap of 11 million.
The current NRL structure doesn't allow for clubs to go broke. In fact they are drafting a plan that makes them guaranteed for the next 99 years.
If NZ get another team they will not only be there for the next century but the salary cap increases year over year...
So they would have little to loose by spending big on a cross code name in a short term experiment to build interest, branding and exposure. It'd be the ultimate marketing tool.
And secondly, the top 30 players in NZ Rugby would be all all blacks and there's 0 chance they're are on a million minimum... maybe the top 10 but I think you'll find it drops of rather quickly.
So a million bucks would likely buy a current All black.. but maybe they throw 1.5 at a better one..
It's not a lot when you have a cap of 12 million, then there's 3rd party top ups.
So they could get an all black.
And the players outside of the all blacks are irrelevant to rugby fans in NZ .. which say that Super Rugby as you put it is only a training mechanism for the all blacks and can't compete with the NRL as a competition
An all black would have the chance to be in a competition that's competitive every week and all the players are extremely significant