I'm going to strongly challenge this because it goes to the root of many issues. Culture matters, this isn't a racial thing, it isn't inherent, it is learnt acculturated social behaviours.
To misunderstand this is so typical of a certain mindset.
Certain cultures are better at creating and sharing wealth than others. The reasons for this are legion and historically very complex, but that doesn't change the fact that certain cultures arriving in the UK are going to do better than others at fitting in, getting on, assisting economically and socially.
To get knickers in a twist and start calling people racist for stating this simple fact shows just how ideologically dogmatic certain sections of our politics have become.