There are so many factors - which airlines are recruiting or shedding, what renumeration is on offer from those recruiting, whether one can take a medium term hit on pay by taking an FO position at a legacy carrier instead of being trapped in a command position at a loco (easier for singles in their 20s than parents in their 30s-50s), the education quality where you are (and costs of private education where state is lacking), the returns on private pensions, shares and other investments freefalling, governments moving goalposts on state pension ages and amounts, changing tax rules, companies going bust or restructuring and wiping out their pension funds...
The point is that those who can afford to retire early should be allowed to do so, while those that want or need to continue working should be able to.