Lets not exaggerate. I don't know a european country where 120.000 EUR yearly income is taxed at a flat 60% rate. I don't think this country exist. Even in France.
In Dubai your "hidden" tax would be yearly:
4.500 EUR for residency per year
2.000 EUR health insurance ( I guess you can find a cheaper one )
(And of course more expensive grocerys, entertainment cost are higher, apartment rent are higher if u you dont wanna live a trashy place)
Then you have all the starting cost of︀ starting a new life;
Flight tickets
Security deposit
Agent fee
Freezone incorporation
Most likely grocery︁ shopping, eating out and enjoying yourself is much more expensive than your home country.
Obviously people are different. But to "only" make 10.000 EUR in profit a month, I wouldn't︂ sacrifice family, friends etc to live
in Dubai/UAE. Effectively I dont even think your tax︃ savings is that much because you suddenly have much higher expenses, relocating costs, your yearly︄ freezone company fee, flight tickets and hotel costs to go and visit your family for︅ Christmas or important birthdays etc.