Think about the year Kansas just had and this might be a way to change the culture. Instead of bringing in young unproven kids who have had a lot of off court problems at Kansas lets try a different approach and bring in some pretty talented kids that still have room to grow and have a clear past at the school they came from. I wouldn't be surprised if Bill wasn't feeling a little heat out of all the bad publicity lately from his players and was told something has to change.
How do you know the culture wasn't started once they got to Kansas? If so then all the transfers are still susceptible to it. Look at what happened when players went to UL and UNC. They started hooking up with prostitutes and getting credit for fake classes. Were they doing that in high school?