Not a single pension program on earth is sustainable - including the US' Social Security System. All of them are political 3rd rails and kill careers of anyone seeking to do meaningful reform.
Why did we get to a situation where the government is in charge of safeguarding your retirement and wellbeing? It's insane... we should compel people to have IRA's or some sort of retirement account, but the money needs to be under the control of the person it belongs to.
So it's why polls quite unanimously report that 70% of the population is opposed of this reform on a quite developer friendly axiom : "When it ain't broken don't try fix it!"
Bonus fun fact 1 : Even with the cherry picked scenario of our gov the system might be in slight imbalance starting 2027 while it's currently balanced. To put this in perspective 10 years ago the same organisation predicted a great imbalance for today.
Bonus fun fact 2 : The 70% rejection poll is an average. One of the only group that is less rejecting the reform consist of already retired people. There is a growing resentment against baby boomers in the xyz generation.
This is wrong. We have an institute that has one mission. Evaluate its sustainibility, and it disagrees with you.