I wonder how a McDonald Caschier can manage...
With plenty of overtime and all their salary in the lowest tax bracket they don't earn that much less.
Remember that figure is probably gross meaning most of your salary will be in the lowest tax bracket but some (it hits you later in the year, just in the run-up to Christmas) will be taxed at a higher rate.
Many academics have other jobs. I know one who is also a security guard at a factory. Also bribery is normal in the education system, partly due to the low wages.
The people I really feel sorry for are the honest ones who end up retiring with a 1000zl pension and nothing else to live on.