Actually both of Pogba'l parents from Guniea but have settled in France, actually Pogba who was born in France can choose between defending the French or Guniea national team, but instead Pogba prefers France while his two brothers are currently defending the Guniea National Team
Defending the National Team is a form of our loyalty to country and I think, every player certainly has the desire to defend their respective country regardless of the salary they get, but obviously the salary they get from the country is not as big as what they get from the club, but of course defending the country in international tournaments is a matter of pride invaluable to a football player.
I personally hope that if Pogba, who is a in France, does not experience the same thing as what Mesut Ozil got when he was still with the German national team, which when Ozil performed well and Germany won they would treat him quite well, but when Germany lost of course ozil will be blamed and considered a turkish immigrant.
Sometimes football is ungrateful to its best players, I only remember Romario's saying that he had to train very hard to be one of the best, and sometimes fame comes for a short time to those who try hard, from In fact, Pogba's problem is somewhat difficult, in the Venezuelan team there are many players who are in Spain, Italy and Portugal, they are great but when you ask them why they do not play for their national team they say never, because they did not give them the opportunity, then this can sometimes come from a very deep problem that only those players have experienced.
Every players in a situation like this have their own personal reasons to not accept playing for their original national teams and in my opinion their decision should be respected by others because we don't know the difficulties, challenges and experiences they passed during the initial period of their lives that lead them to make that choice.
In my country there is also a professional player who refused to play for the local national team. Instead, he played for spanish national team. I don't remember exactly if it was in 2014 or 2018 world cup, but I do remember when Spain played and this specific player carried the ball my countrymen booed him on the stadium and I felt disgusted for that behavior.
Patriotism, love for the country can't be imposed to someone. It must be conquered daily with good examples coming from those who rule the society and the elder ones. But when it doesn't happen, naturally the younger generations will fell nothing for their homeland, especially when they have better examples living in foreigner countries.