>Can you give an example of such a business? even a hypothetical one?

i think a lot of conclusions one can derive from pondering a situation like this one - "there is an order backlog of 800 Boeing 787 planes" and "there are a lot of unemployed people". Even if we suppose that these unemployed people possess necessary skills, the situation would still be pretty much the same as there is a lot of business/financial, technological, and societal/governmental complexity in the situation.

To compare, the unique situation of Great Depression allowed to plow right through the complexity and put people to work. Nobody (in wide sense, i.e nor people nor institutions) has the guts and skills/abilities/resources to put much more people to work on building planes in the current situation.