Indefinite output growth cannot be achieved by scaling labor alone or capital alone while holding the other factor fixed.

“in economics the standard do that is to look at the elasticities of output to the different factors like like capital is less important than labor because the output elasticity of like labor elasticity output is like 0.6 while for capital is like 0.3 but uh neither are by themselves sufficient like if you just scaled one of them and the other remained fixed then neither would be sufficient to indefinitely scale outputs”