I wonder if it specifically says that he is not authorized to charge applicants.
18 U.S.C. §201
==============================
Sec. 201. Bribery of public officials and witnesses
(c) Whoever--
(1) otherwise than as provided by law for the proper discharge
of official duty--
***
(B) being a public official, former public official, or
person selected to be a public official, otherwise than as
provided by law for the proper discharge of official duty,
directly or indirectly demands, seeks, receives, accepts, or
agrees to receive or accept anything of value personally for or
because of any official act performed or to be performed by such
official or person;
***
shall be fined under this title or imprisoned for not more than
two years, or both.
==============================
No. It's not an FAA statute or rule. It applies to everyone who acts in a official federal capacity. Most states too. Or are you suggesting that a health inspector who accepts bribes to issue good reports to restaurants and hotels ok also...so long as it's after he "clocks out"? Or is it that you don't consider issuance of a pilot certificate or rating "an official act"?
btw, "morality" is for editorials and personal belief systems. I don't know whether some of what he did might be excusable based on his or someone else's moral compass. Based on the information in the official documents I've seen, what he did was criminal..