[crtified]

That argument still relies upon the debatable premise that less formal employment means less human productivity.

For example, those "bridging the gap until their pension" are as likely to be reducing childcare costs (which are otherwise often subsidised by government/tax) for their descendants, spending more time on their own health, reducing the $health burden upon government, and any number of other potential reductions of the need for government spending. In equal proportion to the reduction in formal employment load upon the individual.