Yeah, that's my point. You're talking about a retirement plan that impacts retired people who vote in droves. For the considerable future, those retirement age people will be baby boomers. They also happen to run the government. So why would it be unreasonable to expect them to pass laws that are favorable to them during their retirement as opposed to our retirement in 20/30/40 years.
You could pass it, but I suspect all of Congress would be out of a job the next election.