Increased productivity means more output for the input, having people work longer hours doesn't increase productivity.
Also if you MEAN more people in full time jobs then you say "part timers moving into full time employments. Or part time workers getting more hours. You don't say "people have to work longer hours". IN normal speak :longer hours" means more hours than normal.
40 productive hours a week for 47 or 48 weeks a year, less public holidays, is all anyone should need to work to be able to make enough of a living to get by in reasonable comfort.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
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