Obviously, guaranteed money is still the key--but home country seems to have some pull as well. I wonder if non-US boys don't grow up dreaming of playing the PGA Tour the way they do here?
This has been true for as long as I've understood the pro tour. The list of overseas players who eschewed the PGA Tour or battled them over rules of how many events one had to play includes Peter Thomson, Gary Player, Seve Ballesteros, and Greg Norman, but many of the not-so-famous names have resented the idea that the PGA Tour was the be-all, end-all of golf.
And, really, do we think it is? The Tour is trying hard to conflate the four majors with the Tour, and they may get support in their fight from the majors, but that's not the same thing. As for other events, how many of us care [or even remember] who won the Heritage [excuse me, RBC] or Colonial or Bay Hill this year? Only Americans believe that any of those events are more important than Wentworth [now owned by a Chinese billionaire
] or the Australian Open [if they still have one of those].
The main draw of the PGA TOUR has never been the "competition" -- the main draw has been that it pays better, and nobody wanted to be excluded from that.