There are two answers, the liberal answer and the Christian answer.
Liberal answer: It comes from the government, who acquire it by clever trade negotiations and international policy performed and written by superior persons with college educations.
Christian answer: God provides all our needs. Rubber is a product derived from a tree, Hevea brasiliensis. Workers are paid by a company or landowner, who manages a large network of people, equipment, and time lines. The harvested materials are taken to a large factory, which one or several men built using their own wealth, often accrued through responsible management and hard work through generations.