At a guess, I think it is part parachute payment and part we couldn’t spend any money last year meaning that our wage bill was likely (and likely still is) significantly less - I would have to jump in and check each team though.
I did have a quick glance through the finances and it seems botht the relegated sides have been given an additional 41 million!
Plus Blackburn's wage expenditure is really low while mine was high due to the players on loan I am guessing as De Jong was on particularly high wages.