Well, apart from oxygen etc, but I bet you someone is working on that! Perhaps more accurately, most things worth having require the expenditure of resources to achieve – be they time, money, or intellectual effort. This is especially true when it comes to development of leaders within an organization. Great leaders will not just appear one day; you need to work at it and commit resources to achieving it. Indeed many would say that the essence of a good leader is one who dedicates a large proportion of his/her time to producing and developing other leaders.
I guess the above quote pretty much sums it up!