What introduced such things as sanitation, clean drinking water, irrigation, successful farming methods, health care, transport, road, rail and air infrastructure, that sort of thing? Having an empire was not a one way trade for the British, indeed, since the countries have left the empire, most (the notable exceptions being Australia, Canada and New Zealand), most have gone straight down the pan!
Also remember when we were in their countries we also were in the minority and steadfastly remained as a minority!
you forget raped tortured murdered as well as the above infrastructure more