UH OH: Public Pension Deficits Are Worse Than You Think. “Pension plans for state government employees today report they are underfunded by $450 billion, according to a recent report from the Pew Charitable Trusts. But this vastly underestimates the true shortfall, because public pension accounting wrongly assumes that plans can earn high investment returns without risk. My research indicates that overall underfunding tops $3 trillion.”