>and pay those taxes with a smile on their face?
Considering the alternative for them over the past millennia has been, inevitably that they get caught, hanged, quartered, beaten and other various violent methods: yes, they should smile, they're buying their lives with all that money :)
You clearly don't understand psychology at all. Rule by fear has a major downside that Machivelli warned about. If you keep people under threat all the time, as soon as the threat fails and you can no longer point a gun at your head they preemptively kill you and feel good about it.
Threatening violence to get what you want always ends with you being out-violenced by a bigger thug.