Let's say a certain group of people V, from a distant country invaded and colonized another group of people G, in the late 19th century. These people V built mansions for themselves, schools for their children, divided G's land among themselves. They then forced this population of natives to work for them, and built up a vibrant economy from this exploitation
Now we are in the 21st century, all the people who invaded G are dead of old age, and their descendants are still benefiting from their father's colonization. G managed to get political independence from V, but the economy is still in the hands of V.
What is the just thing to do here, both for V and G?