The NFL Salary Cap and Socialism

The big news over the last couple weeks has been about the collective bargaining agreement in the NFL. My understanding of it is that the owners and the players union can't agree on a salary cap. The players want the cap to be higher, meaning that there will be more $$$ to spread around to the 53 man roster. Many owners want the cap to stay relatively low so that they can keep a larger potion of their revenue as profit. However, there is also another major point of dispute in the quest for a new collective bargaining agreement, it is revenue sharing.

The top revenue producing teams would have to share some of their revenue with the lower revenue producing teams. It is argued by the league that this will help keep the "playing field" level, allowing teams that bring in less money the same opportunity to succeed and thrive as the big market clubs. It will prevent the NFL from becoming 6 elite teams, 10 mid-level teams, and 16 low-income teams; Thus creating a better, more competitive league.

If this is easily understandable when pertaining to sports, why is it so hard to comprehend when it is suggested in the real world?