How do Mandela's calls to action work to develop another central idea of his speech?

Those who are voteless cannot be expected to continue paying taxes to a government which is not responsible to them. People who live in poverty and starvation cannot be expected to pay exorbitant house rents to the government and local authorities. We furnish the sinews of agriculture and industry. We produce the work of the gold mines, the diamonds and the coal, of the farms and industry, in return for miserable wages. Why should we continue enriching those who steal the products of our sweat and blood? Those who exploit us and refuse us the right to organise trade unions?