Nobody gets something for nothing, you either give up conditions and get more money, or you go to work more and get more money - its simple.
You (crew) evidently don't want to work standby more - which seems to be the only way to sort crew down (this being the crew down because somehow your department manages to AVERAGE NEARLY 30 DAYS SICK PER PERSON PER YEAR ). Some argue the company needs more people - rubbish. There of course will be a natural turnover per year as some of the younger crew get the travel bug out of them and leave for pastures new. But the the overwhelming issue is your (crew) sickness.
Say there are 4500 crew, thats 135,000 days lost per year due sickness. Based on my other halfs roster, she averaged 10 days work a month, 120 days in 2007 including standby. If you imagine all the sick taken by the same people, 1125 Cabin Crew wouldn't work for an entire year.
Effectively the airline already has 133% of the cabincrew workforce it needs, how many more do you want employed to cover your (crew) sickie?