> But you are going to find vegans working in a slaughterhouse.

Your first link is the first-person account of a vegan who went undercover to document the abject cruelty that exists in slaughterhouses. The pragmatism was in service of a mission to protect animals by disseminating information on such cruelty rather than the “I need a job.” type of pragmatism. There’s a moral distinction here.

The first link's narrator blew the whistle to industry regulators on practices unethical by non-vegan standards, something that is only possible if you're on the ground. The second link quotes an interview:

> Basically, I'm an animal lover. I don't take any pleasure in what we're doing, but if I can do it as quietly and professionally as possible, then I think we've achieved something.

I was not at all referring to 'the "I need a job" type of pragmatism' (which would not be moral pragmatism for a vegan); rather, doing a job that involves killing animals in such a way that your presence reduces the marginal harm could be seen as defensible to a vegan.