We here have presupposed, further, that the rate of profit does not vary with the size of capital; and material and instrument of labour are not regarded as being themselves realizations, capitalizations of surplus labour; as we saw, the greater the already posited surplus time, i.e. the size of capital as such, the more is it presupposed that an absolute increase of labour time is impossible, and that a relative increase, resulting from an increase in the productive force, declines in geometric proportion.
Walang kapitalismong iiral sa mundo. Walang mamumuhunan dahil walang tutubo. Ang tinatawag na kapitalistang tubo ay hindi nanggagaling sa pinuhunan ng kapitalista sa makinarya o materyales. Ito ay galing sa trabaho ng mga manggagawa na kanyang kinapitalan sa anyo ng sweldo. Kapag ang halaga ng trabahong ito ang kanyang binayaran nang buo, wala siyang tutubuin kahit isang kusing.