You're jumping the gun quite a bit there. While those are pretty staggering figures for those players at those clubs, they will not be the norm at Palace or West Brom. Far from it, in fact. Also, for a "mass exodus" to actually occur we would need clubs willing and able to match our valuations for all of our key players and their wage demands PLUS be an attractive enough proposition to make the move. Our first XI are not going to be jumping at the chance of a switch to the Hawthorns, even if they're mates with Chadli. Sure, we'll likely have enquiries and bids from some big sides, but we are absolutely not losing everybody. Our players like playing for Spurs, for Poch and for each other.