This is an interesting thing about the differences among libertarian views on corporate power.
I tend to find right-wing libertarianism very tedious, and often largely self-defeating, given how authoritarian can be the ultimate results of its basic tenets about capitalist property rights. I came to the libertarian socialism with which I now hesitantly identify through a fairly mainstream liberalism.
The line of thinking that got me there is typified by the kind of argument suggested by the above article, in response to the classical liberal claim that more government intervention is what’s needed to keep corporate power in check:
I agree with you that corporate power exists, and share your concern with its evil effects, but I believe you’re mistaken about its causes and remedy. The evil effects of corporate power result, not from government’s failure to restrain big business, but from government propping it up in the first place: this government support includes subsidies to the operating costs of big business, and protection of big business from market competition through market entry barriers, regulatory cartels, and special privileges like so-called “intellectual property.”
The fact that capitalist power can even be amassed in the first place, into such concentrations that it supposedly needs to be “reined in” by the government, relies on numerous such forms of tacit government support which don’t often get seriously questioned. Maybe taking some of that support away, instead of trying to add more safeguards for corporations to find ways around, will actually achieve at least some of what many liberals are really aiming for.