It is not possible to be making things that nobody can afford to buy. This is because consuming or otherwise using something that already exists has no real cost. This is Say's Law ( https://en.wikipedia.org/wiki/Say's_law ).

And Henry Ford paid his workers a high wage because he tried a low wage and had massive, business-crippling problems with employee turnover. Working on an assembly line is hell. One minute of analysis will show that it can never be more profitable to a company to sell product to its own paid workers than to just not make the product in the first place.

Today, most mainstream economists reject Say's law.

...and it would be hard to accuse mainstream economists today of all being Keynesians.

edit: <i> to asterisk