Melbourne had a number of players on their list whose value increased due to finals participation in previous years eg Neitz, Robertson, Holland, Bruce, Green, White etc. Keeping these guys & others, happy would have consumed a good 'chunk' of their salary cap.
What a load of rubbish - thats like an across the board average of over $200k per player looking at it simplisticly. The fact that they are paying 100% of their $8.5m cap is testament to Melbourne being very poorly managed and there are obviously a number of player riding the gravy train.
Take into account they have a list of 39 with 2 rookies. The two rookies will be on or near the base salary of $30k with only half of that being under the cap. First round draftees are on a set base ~$50k plus match payments - less for non first round draftees. ~6 dratees: nett effect on the cap - neglible (probably in total $400k)
And lastly we have Nietz, Yze and White on the veterans list, so only half of their salary is counted. Even if they are on $500k each thats still a grand total of $750k.
That leaves an awful lot of "middle rung" players earning an average of $240k ea a year. If they paid the minimum, the average would still be a shade over $200k. Still too much IMO, but they don't need to be paying diamond prices for a team of cubic zirconias.......