What about the 80% profit on single naturalization? If anything should be "sold" at a loss it should be that one. Surely they want residents to become citizens and participate in democracy? Perhaps not.
Well, for Americans the main benefit is not having to worry about the UKBA any more, but the vast majority of people getting naturalized are from the Indian subcontinent and Africa. For them, a British passport may be worth more than that (and not just in terms of not needing visit visas for other countries).
The reasoning behind overcharging for Tier 1/2 makes sense, since those applicants are ideally making more money in the UK, but obviously there are many other factors that spouses consider.
At least they reveal their figures.. wonder how much "profit" the US or Australia (which had ridiculously high fees even before their currency strengthened) makes. And how on earth does it cost the UKBA £163 to transfer a vignette?