Actually, if I move to a new country, part of why I'm doing that is because it's better than my country, so their ideas/values are better than mine. So the adoption of these ideas/values will make me better.
Take a move from the US to Canada. I might prefer Canada's nationalized health system to America's every-man-for-himself system. But, I might also prefer American's highly interventionist foreign policy and take that preference with me when I move. [Not claiming I believe in either, just an example]
The reason the new country is economically better is most likely due in some part to their culture, not just luck or geography.
This doesn't mean that 100% of their cultural values are better, of course. But you should, if immigrating, take a very careful look at their values, because there's likely some very important things that have caused that country to do so well and for your former country to not do so well.