Welfare?

There are Americans who will go deep into the earth to mine coal, at the daily risk of their lives. There are Americans who replace roofs in 100+ degree temperature. There are Americans who can be seen along the highway doing paving and other work in the heat of summer. Why can't we find Americans to pick fruit and vegetables? It is honest labor which cannot be any more stressful or physically taxing that the jobs mentioned above. How can any American with children turn down any opportunity to provide for them by working at whatever is available? Aliens do, to the shame of the indolent and dishonest of the entitlement generation. How long can we afford to let this continue?