This has nothing to do with a majority of workers. No worker ever has to join a union and unions here aren’t company-based, they’re based on the trade sector. All it takes for unions to request a CBA to be agreed upon is for one single worker to complain to the union.

How hard is it to understand that not everything works the same way as it does in your country?

Do we have any reason to believe that intelligence doesn’t follow a normal distribution? It’s uncommon for these types of variables not to do so, so mean and median should be the same here.