Why so few spinners?

Not for the first time recently the question is being asked in Australia "Where are all the spinners?" People in high places are also asking another question which, whilst it might sound the same, is different. That question is "Why are there so few genuine spinners in Australia?"
A spin summit is to be conducted this year to try and provide answers to those questions and probably more.
The thing about those two questions is the number of questions they create.
Is it the fault of coaches? There are a few who probably believe that.
Is it the fault of captains? There are plenty who feel that way, including Shane Warne.
Is it the size of grounds, or the size of bats nowadays? There is a strong push in that belief.
These are just a few of the questions doing the rounds, each of which creates more questions than we can find answers.
The game of cricket has changed so much over the last 15-20 years and in my view that is the major reason for the demise of genuine spin bowling, either by wrist or by finger.
If in fact those changes in the game eg; 20/20 and 50 over a side cricket is responsible for the decline in genuine spinners being given a chance to develop from junior level upwards. What can be done? Nothing because both forms of the game are here to stay.
Perhaps using proper sized boundaries is one way of encouraging spin, so mis-hits can result in wickets and not public pleasing sixes.
Will less people attend matches if the ball isn't sailing over the boundary like a tracer bullet?
People in high places will probably answer yes to that question. If that is so then please tell me how we, the spin coaches and lovers of the art can continue to promote spin ahead of dot ball bowling.
You see, more questions than answers arise from just a few questions!