Seems the way of the world these days. I retired from one of Australia's best uni's in 2015 after 25+ years service. I worked at a Metroplitan Campus and my managers were located at the Main Campus in the city. From the time I handed in my retirement notice (in person) to one of my managers, until i walked out the door for the last time 4 weeks later i never saw any of my alleged colleagues ever again. When i got home there were numerous farewell emails in my inbox which i deleted, but never at any stage was i invited to a proper face to face farewell with my colleagues.
I was a reliable punctual employee rarely on sick leave while others around me rorted the system to the n'th degree.
I consider these colleagues lower class human beings and will never communicate with them again. My conclusion is that in this era staff get to managerial positions at too young an age well before their time and before they have done the hard yards.