I'm not even saying he should be on 200k now, I'm simply saying he should get a lot more than Lamela and Sissoko. Sissoko arrived in 2016, his pay should have risen from time.
This is all of course assuming that the salaries are correct, which they are probably not.
In order for his pay to rise, he needs to re negotiate his contract, which he has refused.
What don’t you get?