Pay the bills? What does it mean? Sorry i really don't know. Yeah, he is young and he can improve, but I don't think he can be a winger, he just doesn't move like that.
Yes, he is somwhere between no10 and b2b, but he is definetly not like Matic, Kanté or Chalobah. In this system the three central backs, the wingbacks and the central midfielders must do all the defensive work while the two wingers and the striker can play free and be creative. Kanté and Matic can sometimes help our attacks, but they are key players because their defensive work. Baker is young but I'm pretty sure that he will never become a better defensive player than those two. Under Mourinho, Fábregas played in a pretty defensive role, but Conte doesn't count on him at all because he can't name him in the starting eleven in the middle of the midfield. Fábregas have a couple of hundred matches behind him at the very top level, still Conte doesn't think his defensive skills are good enough for this system, so it seems to be unlikely that Baker would ever play next to Matic or N'Goló.