Is that the case though? If you stretch back say ten years, the only two players that have left us for big money and footballing ambition reasons were Bale and Walker, their decisions paid off and some too. Outside of that, every key player we've had has given us their best years - Lloris, Vertonghen, Alderweireld, Rose, Dembele, Eriksen*, Son and Kane. If anything there's an argument to say players have been a bit too loyal to us, not that that's in anyway a problem for us Spurs fans but many in that list could've easily joined a bigger club if they forced it. *Still quality but was in his prime around the years of 2015-2019. As for future additions, I don't think Kane's lack of trophies here acts as much of a deterrence to potential new signings. It's only really those already at Europe's elite that are outside of our reach and the odd one destined to join one of those elite; Bellingham and Osimhen for examples.