I think you hit the nail on the head...Congress stole the money from the Social Security and they don’t make any money without taxing, so they pass healthcare to create a giant new tax base that they can then siphon some funds from to keep the Social Security lie going.
Also, they create a bunch of new Americans through amnesty to further the con.
This is more acceptable to them than coming hat in hand to the American people and explaining that they foolishly spent all the money they took from the generations that fought World War II, Korea and Vietnam for them and they now have nothing to show for it.
You cannot spread wealth around, even if you evenly distribute the money, the wealthy will get it all back in short order.