I can see labor ages skewing upward, though, if a bigger share of the workforce adopts coworking, telecommuting and part-time/contract labor trends. This would make things easier for a share of the workforce that wants to take life a little easier than the average 30-year-old.
Recall that a union laborer with a pension plan can retire with a lifetime fixed income at age 55... and historically this sort of arrangement applied to a large share of the U.S. workforce (including many non-college-grads) not too long ago. And the people who lived/worked under that arrangement were either able to purchase cheap real estate that has since appreciated tremendously in value, or they were able to send children to college and post-college educations that secured high-paying professional incomes... or both... and this slice of society is weighing heavily on the rest of the workforce via high land prices, rent-seeking behavior, and anti-socialist politics. I think remedying this situation would help society far more than a mild economic boost due to retirement-age workers clinging to their jobs