Difference between Protection money and Loan

What is the difference between a gangster pulling out a gun and demanding you give him a thousand dollars of “protection money,” and that same gangster pulling out a gun and demanding you provide him with a thousand-dollar “loan”? In most ways, obviously, there is no difference. But in certain ways there is As in the case of the U.S. debt to Korea or Japan, were the balance of power at any point to shift, were America to lose its military supremacy, were the gangster to lose his henchmen, that “loan” might start being treated very differently.

-‘Debt‘ by David Graeber