Simple answer; people from rich countries will use flaws in the political structures of certain other countries to install corrupt politicians; these politicians are then going to work for the interests of their rich foreign patrons and against the interests of their own people (for kickbacks/self-enrichment). The corrupt politicians will do things like saddle their people with significant public debts (which will force the people to pay ongoing interest to rich countries; through tax and inflation). In the private sector, they will award big, generous contracts to foreign companies, suppress people's wages to allow foreign corporations to maximize their profits, allow child labor, sweat shops, etc...
That's why, as a regular citizen, it's vitally important to live in a country which has reliable, honest politicians. Otherwise you'll be paying for their corruption through taxes, inflation, wage suppression and loss of opportunities.
I can recommend David Graeber's book "Debt: The First 5000 Years"; it makes a strong case about the immorality of international debt.
That's why, as a regular citizen, it's vitally important to live in a country which has reliable, honest politicians. Otherwise you'll be paying for their corruption through taxes, inflation, wage suppression and loss of opportunities.
I can recommend David Graeber's book "Debt: The First 5000 Years"; it makes a strong case about the immorality of international debt.