Anybody who is not a simpleton with zero life experience is aware that being an “underdog in society” doesn’t mean somebody is inherently a good or bad as a person: plenty of powerless people out there when given a little power are revealed to be complete total shits.
It’s perfectly compatible to be anti-capitalist/anti-corporation (well, most corporations) whilst thinking theft without need is also morally wrong. Assuming the corporations involved are exploitative and use lobbying and other forms of political corruption to gain unfairly advantage positions and these people are not stealing due to need, that would just mean that what we have here is two wrongs, and those don’t make a right.