I take your point about conventional straps sliding off the shoulder and onto the neck area
However, the size and shape of the shoulder pad is supposed to prevent that
The idea came from the practice in some cultures, where women carry babies in shawls wrapped around their shoulders...
In relation to carrying a heavy binocular (or camera) bandolier style, I recently came across this interesting variation
It's designed by the professional photographer Nicole Elliott, and available from BlackRapid
See both the BR website at...