You need a limiting principle or there is no limit to the "better funding" you're asking for until you have a Library of Congress in every small town in America, to no positive effect.

What's the limiting principle you propose? It has to be something real libraries and library funding sources can take action on, because they have to take real-world actions on them. So this is not a time for aspirational speeches or vague exhortations to "do more", which is the exact opposite of a limiting principle anyhow. What is "enough"?

The limiting principle should be that for a given ILL region/system, there is at least one copy of each book/edition which entered that system which can be loaned out.

As I noted, it's a pain for me to have to drive down to DC to get access to a book which _used_ to be in the local library system, but isn't anymore, or to purchase my own copy (which wasn't previously necessary).