[selmnoo]

> because while you bear the costs of training, your competitors can then poach your trained employees by offering a salary that is less than your total cost for that employee but more than the salary you pay that employee

I tell everyone that in this day and age, the company is not loyal to you -- they will get rid of you very easily if they need to, and so you should not be loyal to them. However, if the company starts investing in you, training you, then you should be loyal to that company. I would't go to a competitor that pays higher in this case (if they pay higher than 2(X + Y), consider it :)).