It would be simple if he was motivated by treasure. My gut tells me the motivation through his entire adult life has come from something far less innocent than money or greed.
Some people see this country for beautiful land, people, vast resources and uniquely beautiful libertarian Constitution. Not Kerry. I think don't think he sees that, he is not part of that.
When John Kerry went to war, he did so an Officer of the Federal Government, with one duty above all others - "Protect and Defend the Constitution of the United States of America against all enemies, foreign and domestic." His office did not entitle him, it required him to "make the call," to determine the legality of orders and actions that would go against the laws of the US. The laws of the US; supreme being the Constition, secondarily Treaties, then statutory law and the orders of his superiors.
Yet at his own admission and documented in his Silver Star citation, he shot and killed a wounded VietCong who was no longer able to resist (a violation of Treaty and Statutory Law). The facts leave no other conclusion, there could have been no danger from that wounded VC since Kerry, the skipper, left his command, he jumped from his boat to the land, to move towards his dying enemy, shoot him, and capture his obviously empty weapon (an RPG launcher). Additionally Kerry claimed he was "forced" to kill and sack indiscriminately in a "free-fire zone". It was "his call", what did his judgment tell him to do? I say he failed his office, he failed his duty to the nation and its laws.
Finally, the remainder of his oath: "That I will bear true faith and allegiance to the same". On his return he acused his "fellow" American's of crimes for which he had no proof, save the crimes he commited himself. He failed his fidelity to those closest, to those who were willing to fulfill their duty in the most honorable manner possible.
And now, he disavows himself of all responsibility!
One more rant about Kerry and his Silver Star. I've read numerous combat citations of the Silver Star and a much smaller sample of the higher Navy and AirForce Cross. They detail the ugly element of war; violent events, accomplished under severe conditions, but they all exemplified courage and self discipline. Well, all except one.
I'm not quite sure what motivates Kerry, but it's not money. Its probably not even something on the sane side of the scale.
Thats my feelings.
For another take on Kerry's soul, try this: Something Fishy