Between 1990 and 2016, average age at retirement had already increased from 57 to more than 62; it is expected to have increased by a further five years by 2070. Participation rates in the 55-64 age class are projected to be among the highest in large European countries.
(Let me add that we need to revise the age brackets we typically use: ‘65+’ can no longer be taken as synonymous with ‘presumed retired’.) One might think that an ageing workforce would be less productive or innovative, or that grey heads keeping their jobs for longer will displace younger workers. There can be different points of view on this.