Permissions on /home and /tmp are ignored (resetted to defaults after restart/shutdown)

I tried to set tighter permissions on /home and /tmp after the installation of Ubuntu MATE 16.04 (in a VirtualBox VM), but after restarting the system they are lost.

Here is what I tried:
sudo dpkg-statoverride --update --add root root 1711 /home sudo dpkg-statoverride --update --add root root 1733 /tmp

What do I need to make these settings permanent? Or what do I need to disable in order to prevent the reset?