I did not receive any political advice from the department on tools that could be used other than designating safe countries and requiring visas.
That said, you can consider Western European systems. Several use the safe country designation differently. In fact, in some countries a hearing is held within 48 hours if the claimant comes from a country that has been designated safe. Other countries use the tool differently. However, most countries make a distinction from the outset between certain designated countries and the vast majority of countries. What this means is that this is a very widespread tool.