Good point. I really don't think a country can switch side (high to low and viceversa) within a short timespan, maybe not even within a generation.
So, if you want to solve the issue, you use the methods which work in the affected area.
In high trust, as long as the thing is seeing benefitting most, it is often followed. In low trust, breaking a rule is often seen as a sign of independence and generally being cool, so you need to put deterrents to make it uncool to get caught.
At least, this is coming from my own personal experience living in different countries. Might not be the same everywhere.