no there is no necessary theorteical lump of labor
in dynamics lumps might look like they exist where hours shortages emerge
in the flux of effective demand
exploitation max calls for a pool of excess hours
hours are rationed and always the supply at any diven array of wage rates
exceeds the capitalist deemand for those profered hours
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certain progressives take the existence of this over supply as the basis for
an hour restriction law or job time shares etc
The analogy might be corn farmers in need of crop restrictions
Time here is the corn
Ie the crop to be restricted
usually they suggest cultural pressure as part of thr over job attendance
Tendency in capitalist job markets
ANC corporations like this too for the reason above
euphemized as the efficient wage rate of structural unemployment
But there is no lump of labor barrier
It's a lump of profit barrier
