Everyone is better off except the workers who have to pay higher taxes to support more retirees. That might still be a net positive for society but people are going to have a wide range of opinions on where to draw the line.

No everyone is worse off if their retirement date doesn't match when they want to retire.

the later you retire the less money you need. So if you are not personally ready why did you fund that much while if you sant to go sooner you need to save anyway.

There are multiple pension-related plans to supplement or replace the government pension, and most work in ways so that it's not just "smart and disciplined" people.

Retirement age in Australia is 67. A report from 2024 going on the 2022/23 FY said the average age at retirement (of all retirees) was 56.9 years. People typically plan for 65.

Couldn't find Danish data, but 43% in AU rely on a government pension. 27% on superannuation or similar (I assume this will grow a bit). Those reporting no personal income is down from 24% to 12% over the last 10 years.

Here, companies compulsorily pay 11.5% into super funds for staff.

All that said, I'd rather see more support for people living in their prime rather than being tied to a desk. I don't see the point in purely waiting until retirement.