There aren't so many of those jobs, but there are solutions that make this not so much of a problem. On pharmacy I worked at trained their own pharmacy technic

There aren't so many of those jobs, but there are solutions that make this not so much of a problem. On pharmacy I worked at trained their own pharmacy technicians. You can go to school for it and get a license. If you train at the pharmacy, however, it is not transferable to a competitor. Some companies have contracts, stating that you must work at the company for x years after completing training. Occasionally there will be money to pay back. This is exactly so the company feels it can get some of its training investment back. I've seen this quite a bit with education reimbursement and management training programs. You can also simply make your workplace a horrible place to work. Treat employees well, don't take advantage of employees-in-training, give vacations and be reasonable. You know, normal stuff.