That is a shame. Probably should be more poaching. I think most poaching should be from "power" club's 2nd string to other teams. I sense it goes the other way more often however, from "lesser" club best player invited to "big" club team. I would think 2nd midfield on M&D could move over and be first midfield somewhere else, for example.
I think for most it is finding the right fit. Some are content to stay on a "power" club's 2nd team. Sadly, the loyalty the players give to the power club is not reciprocated. The player may even dream of moving up if they just work harder. Sadly, it rarely, if ever happens. The power clubs will always choose an outside player over a player on the second team. Always.