I agree with cville. I can kind of/sort of maybe saying " if I hit iron off the tee into trouble, then I've got a really long shot from trouble, so maybe I should hit driver and just try to get it out there a good distance." Not saying I agree with that, but I can see why that thought might occur to him. However, where he really screwed up was not hitting a short iron layup with his 2nd shot. Just advance the ball 100 yards or so up the fairway, hit another wedge up on the green and you've got 3 putts to win it. Even if he misses the green with his 3rd, he still would've had a chip/pitch and a 2 putt to win it. I have a very hard time putting much blame on the caddie, the player is ultimately responsible. I mean you're a freaking professional golfer, you should be able to on your own manage that situation. Even when Woosnam was penalized for having too many clubs in the bag at the Open several years ago, the ultimate blame was on Woosy. Yes, the caddie screwed up and deserved a lot of blame, but a pro should count the clubs in the bag before they tee off, especially if they had more than 14 on the range. Some guys like Tiger and Jack had the ability to excel in situations where they had to keep their wits about them in those situations and guys like Van De Velde and others just don't.
The funny thing is, Van de Velde is probably far more famous the Paul Lawrie is. The other funny thing is that he was able to make a 6 with his putter a year later, so that just shows how easily he could've managed that hole to make no worse than a 6 with 14 clubs. It's not like there was a 250 yard carry over water on that hole.