Perhaps I am way too cynical, but I think it was something he said that simply because it was appropriate in the circumstance. I don't believe that he intended to be stuck with what anyone can see is an extremely risky position.
Romney as demonstrated that he can say anything, anytime, anywhere. I'm sure that he would have denied saying those things about the 47 per cent. And he would have gotten away with it too if it had not been for those pesky kids with the video.
This is the first time I've seen the quote in full, and I'd agree wholeheartedly with your analysis.
This is clearly a speech made to rich potential donors, in which Romney is trying to explain why he has a good chance of winning despite high polling numbers for Obama. He does so by appealing to their prejudices about lazy goodfornothings leeching off the state, thus simultaneously reminding them why rich people should prefer Romney instead.
Successful politicians are almost all habitual liars, and always have been. They have always tailored what they say to their audience at the time - it's simply that this is getting harder to get away with now because so much of what public figures do is recorded and posted on the internet immediately. It used to be much simpler - I think it was in
A People's History of the United States where two transcripts from Abraham Lincoln's 1860 election campaign are included. In one he condemns the evils of slavery to a meeting of abolitionists; in the other he expresses his continued support for the institution of slavery to a meeting of slaveholders.