Look now UK USA canada they not safe anymore people struggle.....crimes and poverty..... We just need to make few nations rich and most part just working for them so we can provide for UK USA canada people sercurity and good food and good life again without even people working in there like it use to be this will keep safe again those.
What you are implying is indirectly happening, it is most of the developed countries that are milking the resources of undeveloped countries, they will take raw materials and develop it in their countries then become richer. The effect is that as these poor countries are getting poorer their citizens will be looking for a better life and be flooding developed countries like UK, USA and Canada. Check the rate of migrants from many countries that are looking for ways to enter these developed economies, it is on the increase. But if every country is developed like UK, USA, Canada and China, everybody will be happy in their country and crime rates will reduce in the countries that I mentioned.
Now situation is changing frequently and things are challenging, so I am sure in near future it's not easy for developed countries to eat cake as they were doing few years back awareness is spreading and peoples are fighting for their rights.
Having mindset like this surely not going to be helpful for anyone because many countries are having changes and their statics are also improving which is good thing recently crime ratio is increased in developed countries mostly are targeting migrants for this, but they are also blamed for this as well.
USA, UK and Canada are developed countries, so everyone is looking for better life and moving here which is creating problems for them but sadly in quick time no solution is for them need change of mindset and having better things for developing countries can bring positive changes.