Wow, I haven't been on here in a while, and yet reading this I feel I've never been a way...sigh.
There is a big difference between being off work through illness and 'throwing a sickie' i.e. malingering.
If you are malingering and your employer catches you out then it is gross misconduct and you can be sacked. End of.
If you are genuinely ill then you will require to hand in a fit note from your doctor, and if off for more than a week your will get statutory sick pay.
Unfortunately we are in an Industry where it is a huge deal if you call in sick at short notice, as others have mentioned clients need to be rebooked and the rest of the team need to step up. This is okay once in a while and when it is genuine, but someone who constantly calls in sick is really not being a team player and resentment will soon kick in and can cause the team to break down completely.
I can't see why we don't all agree on this one, no matter how the message has been put across.
No one has said people who are genuinely ill should be made to work.