If the increases take effect, contribution rates would rise starting next July 1 for about 94,000 public school employees, all hired in 2011 or after.
The system has not publicly disclosed how broad the federal investigation is and what it involves.
The board of Pennsylvania’s largest public pension system, the Public School Employees’ Retirement System, said it is investigating a consultant’s calculation about the fund’s investment performance last year that is apparently wrong.
Congresswoman Madeleine Dean said these bills aim to protect people who have served their country.
