For similar reasons Trippier went there. Obviously any PL player makes a lot of money and are financially independent for life after a year or two... but getting the opportunity to make your kids, grandkids and grandkids kids financially independent for life as well is probably pretty tempting...
How about a little question mark or something in the headline.
Anyway, it can not be ruled out. Not likely but if they really want to, they can get 99,9% - including Webster - of the players on the planet with the resources they have.