The older I get and the more cricket I watch the more I think the spinner is the most important player in the side. That's Warne's legacy to cricket in my opinion. Every side needs a spinner these days, where as in the years before Warne teams like Australia and England pondered about the usefullness of the spinner.
Disagree. South Africa haven't had a spinner who's had any real success bar the odd Test here and there since Hugh Tayfield on uncovered wickets in the 1950s and still they've been up with the best (when playing) for pretty well all that time. Fingerspin has been of little use in England since wickets became covered (England's last notable spinner at home over an extended period was Derek Underwood in 1972). West Indies haven't had any spinners of note since Lance Gibbs' Indian-summer in the early-1970s - IIRR they started covering wickets around the same time England did. India and Sri Lanka have had a few who've been damn effective at home but none who've travelled very well (if well at all), with the exception of Murali and to a lesser extent Chandrasekhar who were wristspinners. Pakistan had Iqbal Qasim and Abdul Qadir for a time, neither of whom travelled very well, and otherwise there's been no-one there of any note. New Zealand's best spinner in history has been Daniel Vettori who like all fingerspinners has only been a real match-influencer when he's got a turning pitch which being a Kiwi has been pretty rare. And Australia themselves had 1 spinner of any real note at all between Benaud and Warne, that being Ashley Mallett who was effective for just a short time in the early-1970s.
Wristspinners of Test-class have always been exceptionally rare because wristspin is exceptionally difficult to bowl, and fingerspinners have always relied on turning pitches. And in the last 4 decades, turning pitches outside the subcontinent have been extremely rare. You can try to have a spinner if you want, but mostly all you'll do is weaken your side by doing that. Tours of the subcontinent (or home series' for subcontinental teams) are the only occasion any team is particularly likely to have a fingerspinner be a real big influence of the positive variety, and even then only if the spinner is good enough, which many fingerspinners aren't.
It's an indictment on Australian cricket that they've had no succession plan. I guess their succession plan was, "McGill will take over from Warne when Warne retires". But the truth is McGill was washed up two-three years before Warne's retirement. Where's the next generation? I recall hearing one of their new hopes was in the mid 30s (forget his name). Should Cricket Australia have a rule that if a player is above 33 and hasn't come close to national selection he should be dropped from playing for his state? That's just a random idea, but it begs the question whether their state teams feed into the national side in the required manner.
I don't think any amount of planning can make the incredibly unlikely particularly likely. No amount of planning is ever going to produce someone whose skill even comes close to Warne's. You cannot produce bowlers - you can only hope that someone, somewhere has the skill to bowl. And wristspin is just too difficult an art to expect this to happen with any great regularity.
And as I say above, Australia haven't ever had any fingerspinners of much note - at least, not in the last 50 years. There were seamers who also sometimes spun like Ironmonger, Johnston, Noble and Saunders; there were Johnson and Trumble who played almost all their Tests in the days when Australia's wickets were still uncovered; and there was Mallett briefly, plus the even more remakable and brief case of Colin Miller. Otherwise Australia have had spinners of note only when the odd great wristspinner has come along: Grimmett, O'Reilly, Benaud and Warne. And occasional lesser merchants like Mailey and MacGill.
Australia would be best served to realise that it is very possible that they will not have another spinner of note for a long while, and in the meantime stop wrecking their prospects by picking utterly useless types. Australia has never been a spin-friendly country, and one great wristspinner will not turn it into such a thing.