Dissinformation
1) You don't get paid to do a cabin crew course. If you were on flying duties you keep the flying pay you would have earned whilst on the aircraft, but you lose your time away from base payment and any nightstop allowances. So anyone on a course will get less money than they would had they flown.
2) Also no one has failed a course.
3) Also the pilots will not get there pay cut back which equates to a 4%-8% cut dependent on your time in the company.