Shimla, Feb. 10 -- The Sukhvinder Singh Sukhu-led Congress government's flagship poll promise, the Old Pension Scheme (OPS), has hit a fiscal wall. Following the discontinuation of the revenue deficit grant, the state finance department has issued a warning: The OPS is no longer sustainable. In a high-level presentation on February 8, the department recommended a switch to the Unified Pension Scheme. P4...