I can say, for example, that in many private sector firms, particularly large ones, there are no limits to the number of sick days that employees can take. My cousin works at IBM. He's been working there for several years. There's no limit, so he.... Like you distinguished MPs, if you are not in Parliament, nobody will remove pay from you, and there's no calculation of the number of days you're sick. You're deemed to be working when you're off because you're sick. The very same exists at IBM that I know of.
If my cousin is sick for three days, there's no short-term disability kicking in because there's a bit of a lag, but his supervisor will not ask him to bring in a doctor's note or anything. There's no record of it. Also, if he's away for longer, then their short-term disability will kick in, but there's no bank because there's no need for a bank. Because whatever the person needs.... One year, it's one day, the next year, it's 18 days.