Some of our players lack the ability.
Others lack the right attitude.
Klopp will have figured out who is definitely going to be part of his team, who definitely won't be and others he'll still be on the fence about.
This obviously isn't his team. He has brought in zero players.
Perhaps he should be getting more out of the players. Perhaps they should be getting more out of themselves. He's only one guy and a normal one at that. He can't use super-powers to make players better, fitter, more hungry or better at making decisions.
It will be interesting to see out of the current squad who makes the cut in the summer.
For now his task is to keep the whole squad interested. To not let the better players' heads drop at the dross they have to take to the pitch with every week and to keep the lesser, **** players motivated. But partly that's down to their own self-talk so again he can only encourage them, not force them.