Ok, two points. The W.I initially didn't go to a All Pace attack because of a lack of spinners in the Caribbean, it was a direct and deliberate strategy that created one of the two best if not the best cricket team in the history of the game. As I have argued in other threads, there have been three superstars of the game, in order Dr Grace, Bradman and Sobers (possibly Hobbs as well), but two distinct phenomeoms that dominated the game and precipitated changes in the rules of the game to even up the field. One was Bradman's batting and the other was the Windies pace attack from 1976 - 1991. It was not by accident, but with the theory that if two fast bowlers in tandem were intimidating and difficult to face then three would be unrelenting and four would be destructive and unprecedented not only physically but psychologically as well. it was a theory actually tried twice by Hutton, but he never quite gave it sufficient attempts for it to be succesful.
Also the thougt that the attack would be restricted in it's success on slow or unresponsive tracks are not familar with what Marshall and Holding did to India in '83, what Holding accomplised at the Oval in '76 or Marshall in Sydney in '88 or that Garner was basically used as a stock bowler to fill the role of a spinner who could bowl long spells and keep the run rate low and too was effective on all pitches and as far as opening partnerships goes, his with Marshall was statistically the greatest ever. He was also quite efficient at cleaning up the tail with his amazing yorker wihch would be effective on any wicket. This still doesn't factor in Ambrose who was even more deadly on a last day track that the first day, and his last day winning spells atg home and away are legendary. So really don't see the need for a spinner when one has three bolwers with averages under 21 and strike rates under 51 who succeeded the world over and againts everyone and each having their own distinct style and modus operandi just for the sake or percieved variety. Plus there is always Sobers if we do need a bit of variety with LH orthodox or chinamen googlys or LH fast medium swingers
btw South Africa seems to be doing quite well with no established spinner currently and seems to have no challenger at the moment for being the best team in the world.