The only reason there's no furloughs for FA's is because close to 5,000 took a retirement package and about another 5,000 total are either taking unpaid leaves, working in other departments, or flying shared lines. Also, while I don't know the numbers they've implemented a program for FAs above 60 to take a paid medical leave while Covid plays out.
Right there you have about 40% of the pre-Covid seniority list.
Also, FAs don't have a monthly guarantee and many bid for 50-60 hours per month.