For the same reason many Americans dream of Europe, Southern Europeans of Germany, Europeans that move to the States or Switzerland, or even say Central Asians that move to Russia, people in the countryside move to the city, etc.
There's the promise of living richer and having more or simply having it easier. There's nothing else to it and an improvement from Migration doesn't even necessarily have to come true.
For the same reason many Americans dream of Europe, Southern Europeans of Germany, Europeans that move to the States or Switzerland, or even say Central Asians that move to Russia, people in the countryside move to the city, etc.
There's the promise of living richer and having more or simply having it easier. There's nothing else to it and an improvement from Migration doesn't even necessarily have to come true.