Age 60 is a number and so is 65. Why not 65 1/4 or 85? If this goes through there can be no limit. One age is no more discriminatory than another. The medical may/may not be a deciding factor. A plumber, lyer, doctor, business owner etc can retire when they feel like it. Pilots will follow the general rule. Maybe not worldwide immediately but it will come. Basically it all comes down to "human rights". Don't believe me? Look at the laws introduced by the European Union.
If a EU company has to lay off employees they suggest that laying off by seniority is unconstitutional. ie. the bottom 20% is illegal. If followed through there will be an disproportionate number of females, 20 somethings, 30 somethings, visible minorities etc. The solution is 20 % 50/40/30/20 year olds, 20% female,visible 20's, etc. What happens is that a new hire 20 year old female chinese pilot is safer than a 15 year senority employee. It isn't discrimination. It is lawyers.
The whole age thing is going the way of the DODO.