The government made a contract and now they want to change the terms. "You pay into this fund now and we'll pay you back at 55....60....62....." What you don't

The government made a contract and now they want to change the terms. "You pay into this fund now and we'll pay you back at 55....60....62....." What you don't do is change the terms without consulting with the constituents. Because that's how you end your political career in the medium term and cause protests in the immediate term.