There is an argument for this one, its the same as for the EITC which was a Reagan thing and popular with Republicans in to 1990s.
The argument goes that it helps unskilled people gain entry to the job market where they can advance, as opposed to increasing minimum wage and other $$$ mandates.
What annoys me is when its proposed as part of a amnesty package as with the Rubio, Durbin Schumer bill.
Interesting.