This "pension tsunami" has already forced towns like Stockton, California and Detroit, Michigan into bankruptcy. Perhaps no government mismanaged their pension as badly as Puerto Rico, where a $43 billion pension debt forced the commonwealth to seek protection from the federal government after having defaulted on its obligations to bondholders — a default which is expected to spread to retirees in the form of benefit cuts.

While the disastrous outcome of Puerto Rico's pension plan — which is projected to completely run out of assets by 2019 — represents the worst-case scenario, the same series of events that led to its demise can be found in most public pension plans nationwide.

There are three primary culprits that can be found in nearly every state suffering from a public pension crisis: