The state does not need to work so hard to protect the head of state, there is an endless supply of people wanting the job and some of them are even capable of doing it.
There is a science fiction short story about a place where the mayoral regalia must be worn at all times and contain a bomb. At every bus stop there is a button which will detonate it.
I don’t think we need go that far but as a thought experiment it is worth a read. Unfortunately I can’t remember the title or author and I don’t have access to my personal library just now.
