Yes, that would be awful for the children that did not get picked. I am glad that we don't have that here. We do have children that don't go for one reason or another. But that is because the parents have chose not to allow their child but that has happened only on very rare occasions.
There are times when certain groups get to do things and others don't get the same chance here. Music groups like choirs and orchestras go places where the other classmates are not invited by virtue of their not being part of a particular group. Sometimes having a B average gets you certain perks, when it comes to field trips, that the C students don't get. These exclusions are very present here. They are often camouflaged, that's all.