It's like if you were putting together an NBA team would you randomly select black people or I don't know, have tryouts to measure their skill at playing basketball?
Let's be honest: if you were to randomly pick 5 black dudes and 5 white dudes, the former team would have a higher likelihood of winning in any given game. Also, what kind of stupid question is that? No one in their right mind would choose the former option. Your question had no relevance to my earlier comment. I'm talking strictly about random sampling. Also, lol at your comment about wealth "loosely correlating":
Median household income of non-Hispanic white families is second only to that of Asian families. Of course, Asian-Americans make up only 5.6% of the population whereas Anglo-Americans make up 62% of the population. www.census.gov/content/dam/Census/library/publications/2015/demo/p60-252.pdf#page=13
There's also household wealth. In absolute terms, the median white household had $111,146 in wealth holdings in 2011, compared to $7,113 for the median black household and $8,348 for the median Latino household.