In Wage Labour and Capital Marx says:
The economists tell us, to be sure, that those laborers who have been rendered superfluous by machinery find new venues of employment. They dare not assert directly that the same laborers that have been discharged find situations in new branches of labor. Facts cry out too loudly against this lie. Strictly speaking, they only maintain that new means of employment will be found for other sections of the working class; for example, for that portion of the young generation of laborers who were about to enter upon that branch of industry which had just been abolished. Of course, this is a great satisfaction to the disabled laborers. There will be no lack of fresh exploitable blood and muscle for the Masters. Capitalists – the dead may bury their dead. This consolation seems to be intended more for the comfort of the capitalists themselves than their laborers. If the whole class of the wage-laborer were to be annihilated by machinery, how terrible that would be for capital, which, without wage-labor, ceases to be capital!
But capital not only lives upon labor. Like a master, at once distinguished and barbarous, it drags with it into its grave the corpses of its slaves, whole hecatombs of workers, who perish in the crises. We thus see that if capital grows rapidly, competition among the workers grows with even greater rapidity – i.e., the means of employment and subsistence for the working class decrease in proportion even more rapidly; but, this notwithstanding, the rapid growth of capital is the most favorable condition for wage-labor
Shouldn't the primary task of communists be then to ensure and accelerate the rate of automation of labour?