FO RYR contract you make 3500 to 4000 Euros net flying around 80 hours.
Captain on Mcginley or RYR contract makes around 5500 Euros for 60 hours more or less. IF you pay the taxes correctly (40% of your gross salary) if you start to play with the taxes of course you can make 7 or even 8k BUT you are not paying the correct amount of taxes and you are living with the fear that probably one day someone is going to audit and knock your door.
That's the ... reality. Doing everything legal a Captain makes 1000 Euros more than you.