It's rather strange to put one bad apple against the increases in safety due to the Tenerife accident. More than strange, a bit insulating even, negating the work done by thousands of individuals since then.

As I am not privy to the details and/of the way KL handles the kind of cases, so I can't judge the outcome, but it is really hard to fire someone when they perform fine in the key task (flying) and otherwise commit unproven and therefor mostly irrelevant acts. Firing someone in rumors is asking for a court date and most of the time the judge wil order mediation, training, etc. Seeing as how the judge spoke about not 1 case, but the total as evidence something was wrong, an earlier case would probably fall short.

Now that KLM has done those things, build a file, gave ample chances for.impr9vement and things still didn't improve, they could actually fire him.
But as the transgressions were mostly poorly or not documented and not proven (in the sexual cases), a fired employee still has a right to a "transitie vergoeding", result of the laws in this country. For the law hebis just a employee who doesnt really fit in the company anymore.

This would certainly also apply to employees in lower jobs, as long as you dont break designated rules and as long as nothing is proven clearly, you will have a very good chance of staying on board or given the aformentioned vergoeding.

In the Netherlands employees have many rights and are very hard to fire, leading to 7nwanted cases such as this poor excuse of a human.