Consider this scenario:

You have a train hurtling down the track that forks into two groups of people, 10 in one and 5 in the other, some of the people go on to cure cancer and some are murderers and you don't know where they are. Also it's possible batman set up the scenario to kill the bad guys and by flipping the switch you kill the good guys. Or the Joker set it up and the reverse is true.

In this case, you could argue that you only have moral culpability by intervening. Unless you are absolutely sure you have full knowledge of the intended consequences by acting, you can absolve yourself of the moral culpability by non-intervention.

And since we don't know the long term consequences of political actions, there is at least an argument for non-intervention.