WAR
External aggression is warranted when a lower trust polity causes harm to a higher trust polity, and the result of aggression will be an increase in the level of non-parasitism. In other words, it tis always moral and warranted to export high trust against the will of lower trust peoples. The problem is, it can almost never be done without colonizing and ruling them, and bearing the expense of doing it. Most often it is cheaper and easier to punish them severely so that you raise the cost of their low trust behavior until they adopt high trust out of practical convenience.