You really need to review the time line:
http://graphics8.nytimes.com/packages/pdf/politics/THOMPSON_DOCS/thompson_records.pdf
It really does appear that they were paying him to talk on the phone.
The bills after November 1, 1991 were 0.2 hours here to 0.4 hours there for “telephone conference with DeSarno,” a couple of which were followed up with 0.7 and 0.2 hrs “review of documents.” All mention of the “Administration official” ended October 10, 1991.
I've reviewed the time line and the abortionist was a client of Thompson's at least up until August 1992. It seems kind of risky to assume that Thompson was serving his client in some sort of innocuous capacity. The abortionist is holding all the cards...and who knows what choice documents.