Granted, if it were really urgent, perhaps companies would start looking in the most remote places for talents, so with a population of 6 billion perhaps there really would be enough who could be trained. How many of those 6 billions are "free" in a sense, as in not needed for maintenance of human life (farming, medicine, building shelter and so on)?
But do economics really work that way? Could we extrapolate that logic to conclude that there is no problem in the world at all? All it takes is enough money to solve every problem - alas, the money doesn't seem to be there, or allocating it properly is apparently hard. (Hm, some of those talents might be able to help, for a true bootstrap solution).