I didnīt know that a pilot (cadet, Co-pilot or FO) could work without a basic salary.
Whatīs about Govermentīs Taxes? Iīm afraid that is an ilegal financial situation.
Whatīs about Social Security?
They are not a freelance.
Anyway, you have to take into account your basic salary to develop your way of living...
Allowances...may be, or not every month. 1000 euros? Or not