I have not read the paper in question—now I'm going to have to.
I would say this, not having the benefit of having read it, that those terms are terms used in economic modelling, in game theoretic models. It depends in part on the objective function of the policy-maker as is modelled and the horizon over which they discount benefits and costs from any particular policy action.
The terminology is strong, but I suspect it relates to the nature of the theoretical construct of the model. But I haven't seen the paper, I'm afraid. I didn't write it.