“He never identifies Himself as a member of that group.”
He was kind of his own group of one—Emmanuel, King of Kings, I Am, The Word, The Messiah.
So I don’t think it’s meaningful to parse his words on group membership.
The propserity gospel is directly contrary to the Sermon on the Mount where Jesus spoke on that subject. I regard it as rank heresy and deeply embarassing. Jesus’ prosperity or lack thereof is meaningless. God provided for Him every day as God chose. And Jesus accepted that cup every day. One of the themes that plays throughout the New Testament, which His father spoke to Him, is that we are not saved through the things of this world, through water that leaves us thirsty in an hour. Only His living water will refresh us.
That said, some Christians are rich and some poor. Some powerful some not. If they are Christians, they share submission to Him. The notion that wealth is a sign of favor from God surely comes from Satan. If it were true, Howard Hughes was surely the most blessed of all men, fingernails and all. We should be looking more at faith, the ability to submit, the gifts of the spirit and repentence.
You could not possibly be more wrong. As a co-heir with Christ, what kind of inheritance do you believe God has to offer?