That is true, they have spent way more than they should and that's an issue, I do not think that it would be a good thing to have anything less than a championship. I think even that's not really enough, they were in UCL this year and lost, which is understandable that happens and would have expected them to go further before they lose and not the groups but lets assume that was the best, but even in Europa they lost and couldn't go further which is a big issue.
I think the league win was a must, and that's good that they got it but they really needed to do something in Europe as well. Hopefully next year they could both win the league and do well in Europe to make up for this much money spent.
Winning one of the most prestigious leagues is an obligation that must be obtained for a football team that has enough good player strength, because with that victory, they will get additional money from sponsors or investors so they can add to the money assets they have and continue growing to add strength to their team.