Why did North American planters increasingly rely on slave labor rather than indentured servitude?

Many landowners also felt threatened by newly freed servants demand for land. The colonial elite realized the problems of indentured servitude. Landowners turned to African slaves as a more profitable and ever-renewable source of labor and the shift from indentured servants to racial slavery had begun.

Explanation:

Indentured servitude differed from slavery in that it was a form of debt bondage, meaning it was an agreed upon term of unpaid labor that usually paid off the costs of the servant's immigration to America. Indentured servants were not paid wages but they were generally housed, clothed, and fed.

the ones that are losing there jobs

i also think he is correct. i believe they came to washington to protest their rights.