Yes ,we’ve always had immigrants from all over come and work in our local hospitals and healthcare, the international nurse coordinator in our local hospital is actually Filipino she’s been there for years , came for a short stay to send money back to her family and never went back .There are legal routes to apply.Many of the dingy immigrants are from Albania and going to join organised crime gangs. I work with lots of immigrants in healthcare , they have taken the proper way , applied and got a visa in a workforce that is desperately short staffed. They work tremendously hard and pay their taxes , the illegal dingy ones are taking the piss out of our system. It's rewarding people over the ones who apply and come to work.
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Plus the fact the country can overrule their decision or simply change the law.The problem for international courts like this is that they can only take the most serious of cases because they don’t have capacity due to funding
Also, because of state sovereignty and the whole thing of an international court being involved in domestic issues, it’s preferable for the issues to be dealt with domestically. I would guess that in the vast majority of cases that’s exactly what happens and why we don’t see ECHR involvement too