From what I can gather, "resourceful" seems to refer more to someone who can use the available resources in efficient ways. I'm thinking more about someone who has lots of resources at hand (money, connections, information, etc.) but doesn't necessarily make good use of them.
- edit: to clarify, I am not looking for a word describing someone who (purposely or not) makes wasteful use of the resources they have at hand. In fact, the use of the resources is irrelevant; I'm looking to describe only the existence (and abundance) of such resources.
- edit 2: I was looking for something generic, to place in a sentence similar to: "when choosing the person to perform a task, one should take into account their skills, availability, and X", where X would ideally be "resourcefulness", but instead meaning something like "how good is their access to the relevant resources" (assuming resources could be various things, but mostly material and social).
There doesn't seem to be a single term to define this, so despite many good answers, I'm afraid I'm going to have to go with "influential" (or, in the example sentence above, "influence").