The point can be brought out with an example.
In the 1952 paper of Hans Singer from which I have already quoted, one of the conclusions that singer emphasis is the need to raise the then existing rate of saving.
He argued' with some assumptions about production conditions, that to achieve even a 2% rate of per capital growth, with a population growing at 25% per year, a rate of net savings of 6% is necessary, and that this rate of saving is about three times the rate actually observed in underdeveloped countries (Singer, 1952, pp.397-8).