This is true, but those people enjoy their wealth only at the sufferance of the party oligarchy; they take their marching orders on any political issue from the

This is true, but those people enjoy their wealth only at the sufferance of the party oligarchy; they take their marching orders on any political issue from the party and if they ever challenged the party oligarchy on any issue their wealth would evaporate and / or they would be forced into exile. They don't form a separate locus of power that is separate from the party elite, they're completely subservient to it.