Yellin is a disciple of the bureaucratic implementation of Keynesian 'economics' [sic]. It is not a true economic theory nor is it an adaptation of Keynes philosophy, It is a bastardization of it created by undisciplined government bureaucrats with a desire to cement their positions in government by becoming sources of wealth through the printing of the money.
I was taught this bullshit at a Virginia community college back in the early 80s where every dollar of government spending led to $4 of economic growth. This so-called theory has been disproven year after year in country after country for decades now. Yet you still have idiots allowing people like Yellin to hold positions of power implementing this crap.
Yellin spent almost 20 years on the Federal Reserve. Her main influence was over the housing bubble which tanked the entire US economy. Not only did the Fed never see that coming, they quickly implemented policies that would discourage economic growth for another decade. When it comes to economics, Yellin is a complete fool. She isn't teachable. And she can't recognize bad policy. The sooner she is out of office, the better.