It's still very costly for him don't you think? Not playing regular football comes at a heavy price, specially in a WC year. Also a lot could change in a year, he has a massive offer now, maybe next year it won't be there.
Initially I thought they'd bench him to push him out, but it really seems that he doesn't fit the current system they're playing, so even in a world where he agrees a pay cut, he still won't be getting regular football.
I understand that Barca are trying to feck him over, but I feel he'll end up losing much more by staying.