Much of this labor can be consumed into caring for the graying population.
I have read that the Japanese are developing robots specifically for this type of work. Upthread, someone also mentioned dog walking and infant care. Both could be done by advanced robots designed to deal with fragile humans. The dog walkers might actually be way more efficient at simultaneously walking multiple dogs than are people. For example, the robot could easily communicate at the higher frequencies to which dogs respond.
As an elder, I would welcome the chance to lease a household robot that could also do property maintenance chores.
I do wonder about what will happen to the consumer model economy. Perhaps the centralized government will be the first line consumer of personal goods and then dole them out to the remaining humans. The same with GDP: every human would be granted a subsidy based on the productivity to the State created by the robotic workers. It would be hell for those of us who grew up under the human-centric model, but subsequent generations would accept it as normal. With lives full of leisure time, humans could become fully immersed in various sports and hobbies, much like the super wealthy elites of today.