Who in the NRL is it that determines the minimum contract value of 30 x 17 = 510 players? What if the NRL get's it wrong, sorry, of course that never happens.
Seriously how much media driven warfare between clubs and fans is their going to be over player values. There is never ending bitching now over guessed contract values, I can't imagine the outcry over published minimums. Why is X player valued at $50k less than Y player?
What happens if a player is valued at, say, $500k and the one club that can fit him into their Cap only has $400k available? Sorry mate, you're out of a job, go lay bricks instead. You could always try Union or the ESL.
What happens if the NRL (whoever it is) determines a players value at say $400k (the Top 30 average) and they are willing to accept $390k because it will mean staying in the Nth Qld local area with family and friends, in a house that he owns? For $10k he's expected to move to, say, Melbourne where he knows no one, can't afford to buy a house, would have to pay more than $10k in rent, rent that he didn't have to pay in Nth Qld. Although the contract value is higher he effectively earns less.
There are far too many variables involved in determining how much a player is "worth" and it changes constantly. Today they might be worth half to a team and tomorrow they might be worth double to another team.
Always a Bulldog