We also never hear any legislators or "policy institutes" talk about changing the ERS system to a "defined contribution" plan.
If TRS is ever changed from a "defined benefit" to a "defined contribution" plan it should be linked the ERS plan being changed too.
Texas employees "legislators" included get their full SSN benefits unlike Texas teachers. They also have better insurance benefits than we do when compared side by side.
From the linked website:
Retirement for Active Employees
As public servants, State of Texas employees provide critical services to Texans. ERS works to support current and former state employees through the State of Texas defined benefit retirement plan. The State of Texas retirement plan is mandatory for most state agency employees and provides a lifetime annuity when they retire.
In addition to mandatory participation in State of Texas retirement, eligible state agency employees are encouraged to contribute to personal retirement savings. To help them with that, ERS offers the Texa$aver℠ 401(k) / 457 Program, with low-cost traditional and Roth options. Some higher education employees also can participate in Texa$aver, if their institutions offer it.
Along with Social Security, State of Texas Retirement and personal retirement savings make up the “three-legged stool” of retirement income. Please see the Insurance Benefits in Retirement page for information about your insurance benefits as a retiree.