Really?
CIA Gini coefficients: US 47.0 (2014), Colombia 53.5 (2012)
Ratio of the average income of the top 10% to the bottom 10%: US 18.5, Colombia 60.4
https://en.wikipedia.org/wiki/List_of_countries_by_income_eq...
Granted, this is income not wealth inequality. And there are many ways of measuring it. I would like to know your source.