The unity of all life is a particularity of Hinduism which confines salvation not to human beings alone but says that it is possible for all God's creatures. It may be that it is not possible, save through the human form, but that does not make man the lord of creation. It makes him the servant of God's creation.
Here Gandhiji sets the first task of a developing Gandhian economics: Develop an economics that treats all of creation as not only the means but also the ends. Gandhiji continues in the same essay
Now when we talk of brotherhood of man, we stop there, and feel that all other life is there for man to exploit for his own purposes. But Hinduism excludes all exploitation. There is no limit whatsoever to the measure of sacrifice that one may make in order to realize this oneness with all life, but certainly the immensity of the ideal sets a limit to your wants.
Gandhiji hints here that a Gandhian economics would begin with the limiting of wants. He continues
That you will see is the antithesis of the position of the modern civilization which says: 'increase your wants.' Those who hold that belief think that increase of wants means an increase of knowledge whereby you understand the Infinite better. On the contrary Hinduism rules out indulgence and multiplication of wants as these hamper one's growth to the ultimate identity with the Universal Self.*
Gandhian economics may then be defined as the study of how to use our abundant resources to limit our wants and satisfy them over time in a way that enriches both our resources and our selves making self-realization possible for all.
*Harijan, 26-12-'36, p 363-364 (From weekly letters from Gandhiji).