At the very least immigrants would need to fill out a ton of paperwork and endure multiple bureaucratic round trips, assuming the destination country even has the capacity to deal with all applications.
Then the message behind a detailed screening is: "We consider you as an extreme risk, which is only worth taking if we can exploit you enough."
You can't bring your spouse or family, at least not without significant hurdles, and if that process is too easy, screening for the original criteria is undermined.
Considering restrictive immigration policies against your people, you won't be able to find a supportive immigrant community and are totally dependent on fitting in with the locals, and the locals letting you fit in. Just ask Westerners in Japan.
For any kind of screening to work, you also need a ruthless border control and immigration enforcement, including mass deportations if neccessary. An effective enforcement has to - at the least - "inconvenience" anybody looking remotely like an immigrant, before being shown any paperwork.
Many of these factors don't play out in many countries, but mostly with the result that the screening doesn't really work that well. The US and Canada have rather big populations of undocumented immigrants, despite having detailed and sophisticated "screening" processes.
Then the message behind a detailed screening is: "We consider you as an extreme risk, which is only worth taking if we can exploit you enough."
You can't bring your spouse or family, at least not without significant hurdles, and if that process is too easy, screening for the original criteria is undermined.
Considering restrictive immigration policies against your people, you won't be able to find a supportive immigrant community and are totally dependent on fitting in with the locals, and the locals letting you fit in. Just ask Westerners in Japan.
For any kind of screening to work, you also need a ruthless border control and immigration enforcement, including mass deportations if neccessary. An effective enforcement has to - at the least - "inconvenience" anybody looking remotely like an immigrant, before being shown any paperwork.
Many of these factors don't play out in many countries, but mostly with the result that the screening doesn't really work that well. The US and Canada have rather big populations of undocumented immigrants, despite having detailed and sophisticated "screening" processes.