There's really no evidence to support that position. The NDP actually have the best fiscal record of the major parties at the provincial level. This is straight up cold war style ideology and it hurts political discourse in this country.
The country is already stagnant, the NDP literally couldn't do any worse.
Just because Tommy says it doesn't make it true. Look at the NDP in Ontario from 1990-1995, terrible fiscal record, In B.C. 72-75, terrible, B.C. 91-2001, terrible, Manitoba 1999-2014, terrible, Nova Scotia 2009-2013, terrible. I'll give you Rommanov in Saskatchewan. The rest? Higher taxes and fees, government waste and scandal, huge increases in debt.