They don't. The people paying them and the schleps on the drug boats are two different people. They're putting their worthless peasants on the boats; Venezuela is chalk full of them so blowing up a few here and there makes no difference in the incoming bribe money nor to the drug trafficking organizations.
No one cares that they are dead. Not their employers, not the Venezuelan government, not the police who can now exploit the families of the dead even more, nor the Americans bombing them. They are mere expendable flesh in a game of politics, a token blood offering to the kings and princes of prohibition.