[PeterisP]

Well automated intensive agriculture can feed a country by using 1-2% of the workforce.

If we can get well-automated intensive consumer goods industry to provide basic necessities by using 3-4% of the workforce, and can finally make some progress in automating construction and other infrastructure, then I see no reason why all the "standard needs" can't be provided by ~10% of people, leaving the other 90% for these 'luxury' occupations. This can (and most likely will) happen after a few decades, still during my lifetime.