I think what klopp is saying is that fsg do not want him to spend in january unless he really has to...that is the crux if it.
Remember last two januarys fsg spent nothing then sold players and made out they spent massive in the summer.
FSG have bought a number of players in Jan, Sturridge, Coutinho, VVD. It's not FSG, we should have bought a player to rotate with Firmino, but Klopp never looked interested. Now Firmino looks completely jaded and we have no cover. There are good players who become available in Jan, Lucas Moura was very good value for money.