Let me just say I think this guy has a point...

Like trying to teach Ray Charles about Picasso.(No disrespect to Ray Charles intended.) What may be an irony, but time will tell, is that those living in 'Luxury' begin to depend on it's existence .Many things that those poorer consider to be luxuries are seen by the rich as needs. If there is an economic collapse the poor have learned to deal with the situation through invention and practicality If Rich are cast into poverty, their ability to function is seriously compromised. They also become subject to an equality, that is more true than anything they pretend, and the clarification of the term equality through the eyes of those who have little.
They will have trouble dealing with an equality that does not have privileges.

Its interesting the rupture between teaching and practice in modern Christianity - particularly break away protestant sects. Perhaps it has to do with that salvation in Christianity is based on the acceptance of god first and foremost - one's actions towards society being of a lower priority. People must convert first and foremost before they can even engage in various levels of quality, but by converting they are often promised salvation. I contrast this with Buddhism where some of the same criticisms might apply but from a theological perspective it is ones actions over ones beliefs that generate merit - which seems to generate a greater awareness of societal welfare - but alas I'll admit it I'm biased