You want to see "exploited to the max"? Check out the former "colonies" of the former USSR, like East Germany. In NO Brit colony did they ever have to erect a wall to keep people IN.
The Brits were pretty humane in how they conducted their colonies. You might say, they behaved in a Christian manner, turning a profit while keeping in mind the well-being of the people they ruled.
I just saw an article here today about how Cuba was bleeding dry their colony of Venezuela.
I think that many Irish would disagree with that assessment.