Raising the retirement age to 72 is a ludicrous idea. There is a big difference between life expectancy and healthy life expectancy. People live longer yes, but that doesn't mean they're fit to work on a regular basis.
A lot of work these days requires no more physical effort than pushing a few keys. Suspect most could do that quite easily. Besides which, there is much evidence to show that working is very healthy for someones mental well being. You keep your brain active and maintain good social activity, both of which are good at keeping senility at bay.