Jefferson also conceived of the lower classes as literal waste, that needed to be bred and put to productive use, just like the animals and slaves he owned. He wanted to import Germans to improve the breeding of the poor whites, because he, along with the other elites, considered them as inferior creatures.
Again, the founders idea of America was based on importing forced labor - the majority of early Americans weren't people 'fleeing religious persecution', they were slaves, indentured servants, convicts, and the rest of England's 'trash' that could either be forced or deceived into getting on a boat.