Med schools are a particular problem because the pipeline that starts with them is constricted by the number of residents the society/government is willing and

Med schools are a particular problem because the pipeline that starts with them is constricted by the number of residents the society/government is willing and able to support ( https://en.wikipedia.org/wiki/Residency_(medicine) https://en.wikipedia.org/wiki/Residency_(medicine) ). So as long as it's an attractive field (getting much less so in the US) there will be significantly more med school applicants than slots.