If the assumption is that we can all retire at 60 and live 30 years on the dole, and our demographics are such that retirees will outnumber workers in the near future, how do you solve that problem?
Do you import a new worker population of unassimilated Muslims in the hope they will choose to shoulder this burden? (they wont)
Or do you tell people they will of be able to retire at 60? That if they expect to live to be 90, they will have to work until they are 85?
This is the economic reality. The 60-year-old retiree is an anachronism from the days when the life expectancy was 65 and there was a huge surge in working age people caused by the Baby Boom and the entry of women into the workforce. These conditions have changed, and the retirement age must change as well.
People should retire five years short of life expectancy, whatever that is. Many will die while working, and a lucky few will have long retirements. But in the main, people will get a few years and then shuffle off the mortal coil. This is a sustainable model.