In the magazine The Nationalist, the following is written:
"In one respect the Nationalists and the Christian Socialists, who are attempting practically the same work, are right. They are applying to the advance of their reform the system which long and painful work has shown to be the best; they are beginning at the top, and their propaganda is to be carried on, not among the humble and the suffering, where it would, at best, but foster a futile discontent, but among the favored classes, who by virtue of their advantages, should be the readiest to hear and the promptest to act.
It is noblesse oblige now, as ever, and their battle cry has the ring of high minded endeavor, the touch of self abnegation which has never yet failed of a response."
Progressives heard this message loud and clear. It is even the case that in the book Philip Dru: Administrator, there is a full chapter devoted to going out and recruiting along these very lines.
Chapter X: Gloria Decides to Proselyte the Rich
Its true that the chapter in Dru is less than 5 full pages long but still, they understand very well how to recruit from within their targeted echelon.
The rich fall prey just like anybody else does, because the propaganda that's being used is tailor made just for them. Be it that guilt is used, or excessive praise - playing to a person's sense of pride. Maybe greed is what is used to recruit the rich into the cause. Saul Alinsky has also noted this process, when he wrote:
I have on occasion remarked that I felt confident that I could persuade a millionaire on a Friday to subsidize a revolution for Saturday out of which he would make a huge profit on Sunday even though he was certain to be executed on Monday.
Lies, deceit, trickery, fear; whatever it takes. The end justifies the means for a progressive.