I can see how Leo might interpret the passage quoted as above. The following two passages from the Grundrisse, though, tend to make a nonsense of that:
[p. 162]
In earlier stages of development the single individual seems to be developed more fully, because he has not yet worked out his relationships in their fullness, or erected them as independent social powers and relations opposite himself. It is as ridiculous to yearn for a return to that original fullness as it is to believe that with this complete emptiness history has come to a standstill. The bourgeois viewpoint has never advanced beyond this antithesis between itself and this romantic viewpoint, and therefore the latter will accompany it as legitimate antithesis up to its blessed end.
[pp. 409-410] On the other side, the production of relative surplus value, i.e. production of surplus value based on the increase and development of the productive forces, requires the production of new consumption; requires that the consuming circle within circulation expands as did the productive circle previously. Firstly quantitative expansion of existing consumption; secondly: creation of new needs by propagating existing ones in a wide circle; thirdly: production of new needs and discovery and creation of new use values. In other words, so that the surplus labour gained does not remain a merely quantitative surplus, but rather constantly increases the circle of qualitative differences within labour (hence of surplus labour), makes it more diverse, more internally differentiated. For example, if, through a doubling of productive force, a capital of 50 can now do what a capital of 100 did before, so that a capital of 50 and the necessary labour corresponding to it become free, then, for the capital and labour which have been set free, a new, qualitatively different branch of production must be created, which satisfies and brings forth a new need. The value of the old industry is preserved by the creation of the fund for a new one in which the relation of capital and labour posits itself in a new form. Hence exploration of all of nature in order to discover new, useful qualities in things; universal exchange of the products of all alien climates and lands; new (artificial) preparation of natural objects, by which they are given new use values. The exploration of the earth in all directions, to discover new things of use as well as new useful qualities of the old; such as new qualities of them as raw materials etc.; the development, hence, of the natural sciences to their highest point; likewise the discovery, creation and satisfaction of new needs arising from society itself; the cultivation of all the qualities of the social human being, production of the same in a form as rich as possible in needs, because rich in qualities and relations - production of this being as the most total and universal possible social product, for, in order to take gratification in a many-sided way, he must be capable of many pleasures [genussfähig], hence cultured to a high degree - is likewise a condition of production founded on capital. This creation of new branches of production, i.e. of qualitatively new surplus time, is not merely the division of labour, but is rather the creation, separate from a given production, of labour with a new use value; the development of a constantly expanding and more comprehensive system of different kinds of labour, different kinds of production, to which a constantly expanding and constantly enriched system of needs corresponds.
Thus, just as production founded on capital creates universal industriousness on one side - i.e. surplus labour, value-creating labour - so does it create on the other side a system of general exploitation of the natural and human qualities, a system of general utility, utilising science itself just as much as all the physical and mental qualities, while there appears nothing higher in itself, nothing legitimate for itself, outside this circle of social production and exchange. Thus capital creates the bourgeois society, and the universal appropriation of nature as well as of the social bond itself by the members of society. Hence the great civilizing influence of capital; its production of a stage of society in comparison to which all earlier ones appear as mere local developments of humanity and as nature-idolatry. For the first time, nature becomes purely an object for humankind, purely a matter of utility; ceases to be recognized as a power for itself; and the theoretical discovery of its autonomous laws appears merely as a ruse so as to subjugate it under human needs, whether as an object of consumption or as a means of production, in accord with this tendency, capital drives beyond national barriers and prejudices as much as beyond nature worship, as well as all traditional, confined, complacent, encrusted satisfactions of present needs, and reproductions of old ways of life. It is destructive towards all of this, and constantly revolutionizes it, tearing down all the barriers which hem in the development of the forces of production, the expansion of needs, the all-sided development of production, and the exploitation and exchange of natural and mental forces.
-- James Heartfield