In European countries when people reach retirement age they should have a choice of retiring like now or belonging to a new category of people. The working seniors. Working seniors if employed would not collect pensions (only while employed of course) but also their employer would not have to pay any social charges for them. The underlying principle is that people who reached retirement age have already paid their contribution to the pension system they can stop collecting but do not need to contribute if they work. Employers would find it more attractive to keep people or hire people pass retirement age and the pension system would benefit because it does not pay out while the person who could retire still works.
The other big incentive is that because working seniors can at any point quit and collect their pension they would not be part of the forced severance pay system of Europe which is so costly and makes companies not want to hire.
Follow Martin Varsavsky on Twitter: twitter.com/martinvars