I largely agree with the author, but they left out something important: arguably the most important thing that large corporations do to protect their interests

I largely agree with the author, but they left out something important: arguably the most important thing that large corporations do to protect their interests is co-opting the government with campaign contributions, promises of future lucrative private sector employment, etc. Combined with control of the news media to divert attention, huge corporations have superpowers compared to small businesses and individuals.