Yes, that reminds me of English Soccer a bit. How League 2 or League 1 teams sell their guys to the premier league teams.One way this might slow down is if the ncaa instituted domething like the following.
School A recruits and develops a 2vstsr player. After 2 yrs the player blows up.
School B offers him $1 million. School B must also compensate school a 1-2-3- or 4 million dollars for how many years the player was at school A.
If it was one year its 1 million. If it was 4 years than it must reimburse school A 4 million for its investment in the player.
It might slow down the jumping.
It would also compensate the lower schools.