well in the world of espionage most people switch sides after you've caught them and convince them(reason very) to do so and they always pushed metal Gear is that (well the soldier version) though their(soldiers) usually hard to convince unless their merc's (which all it will take is money to switch sides.) And but most depending might or might not, depends on what their goals in life are besides their job(if their not the soldier type and may just want out of the life ) or try to make some sort of deal as long as they stay breathing. most soldier don't like keeping or being prisoner's so once they have what they want from you info wise. well I'm sure you know the rest. yeah they don't show it in the game. but that's why it's a game. might not be fun to see all that in the makers minds. If that last question about switching sides was rhetorical, then just ignore it . hehe