Under the last CBA, players receiving an NHL salary in the minors were not subject to escrow.
I don’t know if that has changed, as I have not read the RTP agreement, as the issue has definitely become a point of contention.
However, if they decided that salaries assigned to the minors were still subject to escrow, you could have a theoretical situation in which the players would exceed the 50/50 split, as each time an NHL salary is sent to the minors, an equal amount of potential NHL salary is created.