It's true that in many areas of modern work life higher and higher productivity is demanded in order to save costs and that in many regions of the world people determine social status and even self-esteem to a large extent on the basis of how high the salary is, but one might question whether these trends are really commendable.
So I have no trouble with your advice, except that it seems to reinforce some already wrong priorities. Many if not most people work too much anyway, not by their own choice, but because they are underpaid and the capital tends to move to places where it already has been accumulated (and wealth is mostly inherited). Giving those people tips to become more productive and increase their chances of 'professional success' is a bit pervert.
So I have no trouble with your advice, except that it seems to reinforce some already wrong priorities. Many if not most people work too much anyway, not by their own choice, but because they are underpaid and the capital tends to move to places where it already has been accumulated (and wealth is mostly inherited). Giving those people tips to become more productive and increase their chances of 'professional success' is a bit pervert.