Work work work

This frightening report out of the US says that by the year 2050 life expectancy will have risen so much that the retirement age should be moved to 85. All very well but if we have the technology to make people live to 120 or whatever, then I figure we should also have the technology to allow people to retire after about four years of work and have futuristic robots in all the manual-labour-intensive jobs, while we sit around watching the holographic smell-o-vision entertainment provided on our luxury moon-base. No?