Valid concern but anything can be negotiated, pensions included. The pension is obviously one of the biggest draws to this job, and without it, attracting and retaining people would be nearly impossible unless overall compensation was drastically increased to a level that was competitive to what pilots and other professionals make. I'm sure at the very least, those with pensions would be grandfathered in.
There would still be still be a regulatory body and oversight that made sure service wasn't impacted. They could even do something like for every controller the new ANSP is staffed under 85%, they have to pay a fine of $1 million per controller for every year that is the case. For example, if actual staffing of 85% is 12,000 CPCs and the actual staffing is 11,900, they would owe $100 million. The $100M could be split up even and distributed as a bonus to all the CPCs as a bonus. The ANSP would also be legally liable for negligence and controller incompetence similar to how the FAA is currently sued by people trying to secure the bag. There would be an incentive to be safe and efficient but everyone either loves to ignore that part or is too dumb to understand it.
Or I guess we could just keep on doing exactly what we're doing now and hope things change. Don't worry, big NATCA is fighting hard for you everyday. Just keep that due money flowing in the meantime though. Maybe you'll get a 2 day weekend and a raise that keeps up with inflation so you don't have to work 6 days a week to still just live paycheck to paycheck. With the rapid pace of improvements coming down the pipeline and making their way through Congress, I'm sure you'll be able to make it to your kid's tee ball game before the cat's in the cradle.