Because they're not. One bad professional turn, health problem, or lawsuit and they are thrown out like garbage.

They're detested by both sides. The regular poor proletarians see them as kapos (and, quite often, it's the case) who have sold them down the river in order to get themselves temporarily pampered. The upper class, of course, has no respect for them. They've rejected their own tribe (the proletariat, the 99.9%) in the hopes of ascending into a new tribe that will almost certainly never actually accept them.