The cost of health insurance for New York City public employees and retirees is projected to grow by almost 40% by 2016 — rising to nearly $7 billion a year. That growth will amount to $1.5 billion of the $1.9 billion budget deficit projected for 2016.

Across New York, the cost of health benefits for retired government employees is growing so rapidly that it threatens to crowd out funding for essential government services. Rather than lay off police or close libraries, public officials may want to use their discretion to alter retiree health insurance — but some state legislators are trying to take away that discretion.

Amid its budget crisis, the city is on track to lay off teachers, close fire companies, cut social services and impose other sacrifices. Yet such reductions could be avoided if the city reformed its unusually costly commitments for retiree health insurance and brought them in line with those of other public-sector employers.