I manage a small team and have had several staff take the complete biscuit with sickness.
One took a year off before retirement - we couldn't recruit until she handed in her notice.
One got a similar job while off sick for 6 months, she then went off sick in her new job
Another got the job 'to cover her bills while she recovered from bunion surgery'
Currently I have someone off sick with a history of long and short term sickness. Has been off sick for half the time she's been in her post- 6 months. I follow policy, and refer her to HR who keep giving her more chances.
I find many staff use their NHS salaries while off sick as their sponsorship to do other things in their lives. This cannot be a good use of public funds especially with how things are at the minute.
These staff would not last a minute in the private sector. Sickness records don't seem to matter which to me is a huge indication of a person's commitment and reliability