"Eriksen fell into the manager's lap" - I mean what the fuck does this even mean?
Eriksen signed for us August 2013 (arguably the only successful signing from the Bale money). Pochettino became our head coach in 2014, so he inherited Eriksen ("fell into his lap"). He took a punt on Dele about a year after he joined (and you could argue that it worked). Kane was at the club long before Pochettino and it took a lot of persuading to play him (Soldado and Adebayor we're always first pick)
The point I'm making is that if we did sign players during our "the squads good enough/who would we sign/who can we afford/the stadium's being built /we can't get rid of the duds (pick any one from the list of excuses)"; we'd have 6-9 players new players in the squad of which 2-3 would be first teamers and one (perhaps) an Eriksen or Kane.