Forget your romanticized picture of Ryanair truckflyer. I have never had more than an average of 3300 take home as an FO on the highest scale.
You can of course make claim bogus "expenses" to reduce tax but don't really expect to get away with it for long.
And with that I have to pay my normal living expenses, and of course pay for an apartment in a second country since Ryanair sent me to somewhere far off with no chance of coming home or the base I want.
Paying for hotels, food, uniform and putting some aside for the day I have a car accident and no income for a few months.
There isn't a lot left after that is there truckflyer?
Let's not forget that after several years of working here I have yet to earn a single penny into any pension fund in any country.