Basically, what I mean is that the more units you try to keep ready and extend, the more you reduce the amount of training time, depending on the overall time, that you can devote to all of them. What you end up developing over time is a force with an army, navy, air force, or joint whatever you call it, that has a lot of people who have some experience and knowledge and readiness preparedness, but the extent of the depth in it, the ability to exploit the combat training systems and all the scenarios, you just don't have time to integrate all that. The depth isn't there, but the breadth is there.
On March 1st, 2012. See this statement in context.