There's probably not too many "poor kids" in Taiwan.. as for the 20-something "English teachers" roaming the likes of Cambodia, Laos etc, unless actual NGO workers they're overwhelmingly teaching the better-off locals' offspring for comparatively slim pay --- more than accounted for by incredibly low and highly tweakable cost-of-living, lots of public holidays, low-to-zero minimum standards (other than "a proper attire" ie dress shirt, and saving everyone's faces at all times) --- which when motivated gives them great freedom to evolve their own didactic approaches and when not (such things ebb & flow after all) easily let's them approach the task at hand in a very laidback, relaxed, low-effort manner.

Not saying it's the best model for all societies, but it's assuredly not without it's charms for all parties involved. Different flow.