you are right Christian too many unions doesn't work.
AIR FRANCE has one big union SNPL(Syndicat National des Pilotes de Ligne) plus 4 or 5 minor ones.
AIR LIB : 6 pilot unions (SNPL, SNPNAC, SPAC, UNAC, CFTC,ALTER) and 3 cabin crew unions.
and all theses unions represent less than 10% of the employees !!!