Rarely does anybody make the statement that "My adoption of your values will improve me"
Implicit subtext is that, all of my values are better than yours. Strikes me that this is probably quite unlikely.
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.
"Now as I have been welcomed in this country I am willing to adopt their habbits because I want to be part of this community and the community will accept me more easily when I am doing so."