That's not how it works. It depends on whether (how much) they are paid and if so what do they buy with that payment. Are they settled in US buying pizzas and Netflix?
Because if not, then investments to Nigeria past $x will grant it the upperhand since all that money can get you another doctor and more.
5 years is truly a big kill. looks like its a reaction to 99% of them refusing to send money back home and invest in Nigeria, preferring to buy-US and -Europe.
Not sure if you are deliberately misunderstanding at this point, but the problem is obviously not where the doctors spend their money, but the fact that they are not practicing medicine in Nigeria – as Nigeria might reasonably have hoped them to do once they completed their training.
? The problem is obviously whether (how much) the doctors are paid and where they spend that money.
You cannot expect an article to tell you these things.
Whether they work in Nigeria or not is not the issue. The issue is that they are doing it without compensating the country. Worse, they clearly don't intend to come back again (so you don't Ever get compensated at all, not just suffering time value of money) otherwise there's no need for a 5 year penalty. which is relatively huge compared to what the other countries are doing.
I guess sending money back home is not big in Nigeria culturally like it is in Mexico? Welp, I can't enforce you to send money back but guess what, I can enforce you to not leave at all.