Not performing is great in theory, if you are financially secure, have a pension etc. If not, how do you keep living?

I imagine that you would have to claim incapacity benefit or income support.

I've known people with drug/alcohol problems who were in other lines of work who have had to do that. Some, that I know, have been sacked because of unreliability as a result of these kind of problems.

I must say that I am very sympathetic to people with these problems but I wouldn't be able to watch somebody make a fool of themselves, it would upset me too much; I'd just leave and not worry about what it had cost me - but I wouldn't do it twice.