Who do you think is working the farms now? They're white owned, not white worked. Europeans didn't know how to farm and learned how from the natives. They also didn't have seasoning
managing is a different skill from following directions. same reason communist factories aren't magically productive when taken over by workers
Look, the fact is there is nothing that the european's have that the aboriginal negros need. Negros have been around for a long time don't you know that? Before caucasians existed