Pretty selective on that one season there.
As has already been pointed out by several other posters, Wolves were well up in the top half of the table on net transfer spend over the 3 year spell in the Premier League, think pretty much everyone of Mick's signings in that spell went into Wolves' top 10 most expensive signings, even dross like Halford got himself up in there for Christ's sake!
The final season saw something of a dip, yes, but I think that was more down to Mick's choice rather than a tightening of purse strings from above. Following O'Hara's arrival on loan the previous Christmas Wolves had a pretty healthy points return, I think that lead Mick into a false sense of security, with that signing made permanent and the addition of Johnson I think he expected a whole season with that sort of points rate but alas the whole thing went tits up.