The tax subject as usual is a sensitive subject. Win or loose , have to come from a previous status. If you join , you will not loose because you will get what you signed for.
Now, if you choose a flying career according to the size of the payslip, you will have a poor day and a dull life. ANY flying is good if you can enjoy it. It is all about lifestyle and ego satisfaction. 1 prop , 2 PT6, 3 TFE731 or 4 RR5000 ? It is all the same..
Your best bet is to live where you will comfortable, with the persons you love the most and have a little bit of money to enjoy the package. If you can meet this lucky you, if not....
Many stories about the taxes, the facts as today are :
You sign a UK based contract with Netjets Staff Management
You live in a european country ( not UK or Portugal)
You are taxed at source at a 20% rate, witheld on your pay slip
You pay NHS in UK circa 5000€/ year
You receive your work schedule by Netjets Transportes Aeros
You receive a statement from the portuguese authorities on how much taxes were paid on your behalf in portugal.
What you do or not do with all this is as always up to you. Polemics and rumours can go , the lawyers have opinions, remember they are only advisors, only a judge can rule; so until a courtcase eventually shows up from an individual. It is like this...