It has led to people having an extra 4 hours of free - time during working days .
In high - income countries life expectancy is now over 80 years , extending well beyond the traditional length of working life , causing social and economic problems .
life expectancy has led to people having an extra 4 hours of free - time during working days .
In high - income countries life expectancy is now over 80 years , extending well beyond the traditional length of working life , causing social and economic problems .