I think he's saying that the Financial sector of the Service economy is way too big, employs way too many people and that may be true of the Service economy itself! What do you do with all these people when they are no longer needed to produce real things, which itself has been exported from the US?

If we are not getting many imports, we suddenly will need to produce real things. What do we do when we don't have the facilities to produce these things ourselves, and loans are very difficult to get?