Correct Ann. In fact, it was the mass cheap labor immigration wave from 1906-1920 which caused the last Great Depression. And now the same thing is happening again today.
In fact, laws were passed during the last great depression – and later – in order to prevent this from happening again. Laws such as Title 8, Section 1182 Inadmissible Aliens, Subsection 5. Those laws are now being ignored.
Greed run amok.
But once again Americans do not learn from history.