Are MLB teams going to take in these players when they are 14? Because thats what would need to happen. Unless it came out of revenue sharing there is no way teams are going to pay for that. There would be a ton of costs to pay for the infrastructure, security (going to need a ton in Venuzuela), and scouts to go find these kids.
Owners would never agree because they want a draft to save money, building these academies costs even more $.