I'd say it's far more likely down to the fact that a lot of Aircraft owned by these countries are quite old compared to the more modern ones used in the UK and America. Planes are assigned 'Flight Hours' which is the maximum amount of time they can spend flying before they need to be mothballed. A lot of these aircraft are now approaching their maximum flight allowance and have been reconditioned to keep them flightworthy.
Now, by official standards, Reconned aircraft are perfectly acceptable, and as someone who's worked on them, I'm inclined to agree, however, these aircraft are still getting old, and just like humans, no amount of maintenance can really fix that
