In terms of the tooth-to-tail ratio, you have to understand that people sometimes use the analogy of an arrow. Sometimes you need bigger support in the back in order to make sure that your fighting edge is quite capable. You need to have a certain amount of overhead and indirect support.
The tooth-to-tail ratio is an important way of looking at how much is being put on the overhead, but sometimes some capabilities actually require a good amount of support as an overhead. Imagine, for example, even within the navy, some of the air force capabilities have to be included, and the air force would come with their own set of supporting elements. Sometimes the tail needs to be bigger.
We don't usually say that there's a fixed goal to achieve, but we always have to make sure that there's a reasonable amount of overhead to go with it.