Context: The states, which revert to the Old Pension Scheme (OPS) could face "unsustainable" fiscal stress, says an article in the Reserve Bank of India.
Old Pension Scheme (OPS)
o It is also known as the “Defined Benefit Scheme,” providing government employees with 50 percent of their basic salary to secure their future.
New Pension Scheme (NPS)
National Pension Scheme (NPS)