The idea was to cut off revenues from the «beast» (i.e., government) and then argue that the resulting deficits were bad for the economy and that government programs and services would have to be cut to eliminate the deficit and stop the debt from increasing. (3dpolicy.ca)
Suppose the quantity of money is increased by tax reduction or government transfer payments, government expenditures remaining unchanged and the resulting deficit being financed by borrowing from the central bank or simply printing money [he adds a footnote, which Friedman lifted without direct attribution: «Open market operations are different, because they result merely in a substitution of one type of asset for another.»]» (philosophyofmoney.net)
There is also no doubt that without these tax cuts the government would have been in a much better fiscal position to deal with the 2009 - 2010 recession; that any resulting deficit, would have been eliminated much earlier than 2015 - 16, and without the need for draconian cuts in federal programs and services. (3dpolicy.ca)