I've never agreed with team managers or coaches deciding on player wages. They usually have little or no financial knowledge or acumen and the experience with MON shows where it can lead. For me, Managers should identify which players he wants to sign, maybe agree the signing in principle, then the financial negotiations should be part of the chief executive's remit, like I believe David Dein used to do at Arsenal.
Regarding the Mail comment above - the O'Neill era players gave off the same feeling of togetherness - Ashley and Jimmy still left, and Downing.The current crop may well love playing here, but I don't expect them to stay if the richer clubs want them.
We also need to remember that like players, managers don't stay forever. We need a plan of succession, as opposed to stumbling blindly from one manager and one strategy to another. Swansea seem to have that side worked out.