That would require technically and legally savvy people to make such a scheme work. These people couldn't even secure a cold wallet.
True. The whole Mt. Gox thing looks like a combination of ineptitude and crookedness, not some grand plan. Mt. Gox had a good moneymaker, and Karpeles blew it through a number of dumb moves, then tried to cheat out of the mess. (That's not unusual in business history. Enron, for example.) The Sunlot crowd just looks like opportunists. The recovery effort is getting nowhere because nobody competent is pushing forward in the courts in Japan.
Courts in common-law countries are purely reactive - they do nothing unless someone brings a case to them. You have to do all the work to move the case forward.
I don't have any basis to disagree with a thing you've said, yet I can give you a great many reasons why someone could have helped MK blow up Mt. Gox.
Think about how a magic trick works--your attention is momentarily distracted, and you focus in on the magician's hand waving, while unnoticed, he drops a bunny out of his other sleeve.
Everyone always concentrates on the 650,000 bitcoins that are supposedly missing, while almost nobody ever questions the $27,000,000 in bank deposits that have also disappeared. The 650,000 BTC either never existed in the first place, and were figments of Willy and Markus' machinations, or else are, for all practical matters, completely untraceable.
What do you want to bet someone at Mizuho Bank knows exactly where that $27 million went? I'm not saying they necessarily took it, but banks are in the business of knowing what happens to money--they'll know who has it, or where it went.
In any event, it's not like banks have never been known before to engage in asset stripping. They should at least be questioned. I refer you to the CCI investigation of Mizuho's European correspondent banks:
http://www.mtgoxinvestigation.com/The money trail should lead right to the guilty parties.