Is he a fraud?
At Barca he spent less than many top European clubs at the time he was the manager, but still cleaned up. People forget that most of that team were made up of players who came through the ranks, or were bought back from another club, after coming through the ranks and being sold on.
People can’t have it both ways. The top money clubs in this world are Bayern, UTD, now Barca too, Real, Chelsea, PSG, City etc. They spend big (net spend and wages) on a consistent basis, year after year after year.
The top managers go to the top clubs, and the top clubs are still the top clubs because they spend the dough. Sure, you will get a Leicester, or a Monaco coming through, but they don’t stay as they don’t have the income or a rich sugar daddy to seem them through the long term.
Pep has spent big, because he’s been at big clubs, Mourinho spends big because he has been at big clubs, and I think you will find that career comparisons will show that Mourinho has spent more money on transfers in the history of football.
If you managed a top club, you wouldn’t have say a Alladyce spending your money...