Gmax,
As a pilot from the US, your salary is not tax free. Unfortunately, you still pay tax to Uncle Sam. Not too sure what the threshold is, but you pay.
On a side note; all that glitters is not gold. Don't be fooled by the salary advertised here. Life here is very expensive as is rent. On top of that you will work mainly night flights, which believe me, take their toll.
Eventually you'll upgrade, true. However, the rest bite you gained after 2-3 years as an FO will be lost as you become a low seniority Captain...... yep, you guessed it, back to mainly night flights.
My humble advice is don't come unless you're really in the sh*t. Money can buy you short term happiness, but won't buy back your health.
Best of luck
