My understanding was that once Hagi reached a certain number of games he was entitled to a wage increase. I believe he was on £21k p.w. but he waived the increase and was allowed to join the first team squad again.
What I would say about Hagi is that he had more of an entitlement to his wages than some of the others on higher wages. At least he was in the first team starting XI & playing well.
I genuinely hope he doesn’t leave. Replacing him with similar quality won’t come cheap. Sometimes you need to bite the bullet so to speak