For comparison:
My brother is a 737 LHS in UK
He makes £5knet his wife makes £1.5k net
£6.5k
Mortgage + bills + food+ car etc is £1.5-2k
That leaves him with £4.5-5k to save, invest, drink or whatever. Add to this the fact of 750hrs per year with the only sand being the bi annual holiday to europe.