everyone makes mistakes at work, were only human, i cost my old company £40k in one hour, did get a written for it though

theres always someone else you work with that will get away with more for less punishment
i guess it depends how much they want you out, if youve been there a long time, the bigger the pay packet they would have to give you when you leave
eg. i was at my old company 3 yrs, i got £3k and a good bye youre no longer needed, a guy at were i work now left after 14 yrs, he picked up around £40k i believe