Well, it seems to me that steps three and four couldn't happen unless jazz visibility was already much higher than it is. You're not going to get city involvement unless jazz is already visible and is considered important, either by a large segment of the population, or by a large segment of the rich population who would push the agenda. Step four also ignores the fact that a city the size of New York is going to have a lot more jazz opportunities, than a city the size of say, Portland. And there's nothing that can be done of that.
As for the first two steps, you left out the critical first step: raise a shitload of money. It takes serious money to open more clubs, start new publications, etc. And while I think that music education in schools is very important, a lot of other people have different priorities, and there's a limited amount of money in the education pool.
Face it: the jazz scene in New York is always going to be better than the jazz scene in smaller cities. More people equals more jazz fans, and more jazz money.