So arguably the 3 of the most successful teams in recent years (Wigan, Warrington and Leeds) Have the least over seas players...

The lack of over seas players is making the league dour? But the best teams have amongst the fewest? Kind of conflicts?

Warrington have a very classy team with stacks of top players whilst playing under the SC

Maybe the problem is how the other clubs use the available money

Well it's long been an issue that struggling clubs can't attract top players no matter how much money they offer

Indeed it might be a top flight player would go to say Wigan for less then they could get at Salford

I dont really agree with that because i think one of the benefits of it would be that players in or about the fringe of being 'marquee' would be more likely to move from a big to a smaller club if those smaller clubs were offering 'marquee' contracts. At Leeds for instance we Have Hall, Burrow, Mcguire, Sinfield on the top 4 contracts, There is Watkins and Hardaker who should be getting close. At least one of those couldnt be offered a marquee contract by Leeds. But i can't imagine Salford would have trouble offering one.

Rewards failure.

Not sure how that system would work either really, a club could only really spend the salary cap and then bolster the squad with a couple of 1 year signings as you wouldn't know what you could spend in year 2 or 3.
The only way that kind of system could work really is by taking an average of a clubs league position over 3 or so years, and then saying for the next 3 or so years a club could spend so much more than the cap.
But I still wouldn't be in favour of it.