Putting in overtime is a productivity-killer:
If you still need convincing that long hours destroy wealth, look at 2012 OECD figures. The country with the longest hours was Greece, followed by Hungary and Poland – and they ranked 26th, 33rd, and 34th out of 34 countries in terms of productivity. By contrast, the countries working the fewest hours were the Netherlands, Germany and Norway, which rank fifth, seventh and second, respectively, for productivity. Overall, the more hours worked, the poorer the productivity and wealth creation.