I can understand Barbara's attitude concerning her ex-husband. She blames him, and rightly so, for damn near ruining her life & that of their family and for the death of her son Jeb. Her wanting his money makes a lot of sense when seen from her point of view; he owes her and the kids big time. The fact that George Snr. does in fact cough up the cash on what appears to be a regular basis indicates that he shares that belief; that his activities did result in the death of one of his sons, that he pushed Barbara away and that he does indeed owe her. The fact that she can narrow down the search area for his hunters and that she no doubt has a "in case of my death" file also accounts for his keeping up the payments.
Personally, though, since Parker knows that Bush has worked with the CIA to deliver arms to places that the US would rather people didn't know that they were supplying, I'd say that it is entirely possible that someone(s) within the CIA leaked the op to Arbusto. If so, their rationale would be that they still need access to his services, but that he needs to be aware that there are lines he should not cross if he wants to remain a) alive, b) free, and c) in business, hence the US participation in this op. It gave them access to German intelligence on Arbusto and a means to tip him off because their people on the ground would know the timetable for the op itself. It also enables them to use & blame the Greeks, who he is supplying as well as the Turks, for any delays that might have enabled him to bug out just ahead of the op.
So, Roy was possibly correct in saying that the higher ups were playing games, he just got the side wrong. Parker is probably thinking along the same lines, being CIA & no longer quite as naive as before, and might be quietly pissed that his people were put at risk in an op designed to fail, by the CIA, in order to "send a message" to an independent operator. The US State Department & various European Foreign Ministries are probably happy though, as they will see this as a breakthrough in trans-Atlantic relations. However, I don't think the various US intelligence & military agencies will be too happy when they realise that the concept of reciprocity applies; they have been guests at a German military base, there will be a request for return visit to an American equivalent "to foster the spirit of co-operation & world peace". The idea of German special forces types loose on one of their bases will cause certain people to "have a cow".
An office in the US War Department*:
(intercom buzzes)
US General (Chief-of-Staff): "Yes?"
General's secretary: "Secretary of War on line 2, sir."
(Phone rings)
General: "Hello, sir. What can I do for you today?"
Secretary of War: "General, I've just got off the phone with the White House and the State Department. WE will be having some guests at Fort ***** some time in the next six months."
General: "The President is going to inspect the troops down there, sir?"
SoW: "Not exactly. It would appear that the Germans have requested that we host some of their KSK troops for a mutual training exercise to foster international goodwill or some such crap. The President, after listening to the State Department, has agreed to said visit."
General: "... is this for real, sir?"
SoW: "I'm afraid so, General. Apparently, our request to take part in that failed op in Greece gave them the idea for this little brain fart."
General: "<insert expletive of choice here> (repeated variations of this, at volume) bad idea, sir!!!"
SoW (holding phone away from ear): "You haven't said anything that I haven't already said, General. The President has reservations about this himself, but he has ordered it to happen none the less. Fort ***** WILL have guests from Germany in about six months. Make it so."
General: "Yes, sir."
(Phone call ends)
General: "@#$%!!!"
*Did the US even build the Pentagon ITTL?