Of course this is just an estimate but:
DDG, Pogba, Maguire, Fernandes, Mata, Bruno, Shaw, Rashford, Cavani, Martial, Lindelof, Fred, AWB and Henderson - combined apparently earn about £2.7 million a week
Multiply that by 52 weeks over 4 years and you get about £560 million
I know Messi is better than our players but he has made as as much as roughly our 14 highest earners combined. Just to put it into perspective. He earns more than the entire Liverpool-side combined. He must go down in history as the best and most selfish player ever. Just to get the salary he wants, he is willing to run his club into bankruptcy - and evey worse, he makes so much that the majority of his teammates probably don't even have 5% of his total salary.
Edit: I just notice that the amount was in Euro - so maybe just as much as 11-12 of our players then