There are zillions (well no, not zillions, but plenty) of people in the independent means programme. There is nothing particularly oblique about it, money talks.
A lot of the people in this category own a house here, but don't stay here during the winter (can't imagine why), so although they *could* qualify, they just use standard visitor visa.
Others who *could* qualify, but opt not to apply include Madonna, who got a spousal visa because the path to citizenship is three years versus six years.
In truth, for the really high rollers, like a Sultan or some such, the guys who permanently reserve an entire floor of a hotel, they don't even care because they have other problems which are more pressing.
It's not a big deal. If you qualify, just instruct a law firm or fill out the online application.