Boeing, General Dynamics, Lockheed Martin, Northrop Grumman, and Raytheon, the Member List of the Project for a New American Century (formerly in support of the Bush Administration, neocons, Patriot Act, War on Terrah, etc, but then jumped ship to Biden and became Never Trump).
Nearly 700 former high-ranking government officials, including former generals and admirals, went to work for defense contractors. Some are corporate board members and highly paid executives --- Well over 600 of them became Pentagon lobbyists.
Certain Biden donors/funders withheld $90 million in funds in order to get Biden off the ticket -
https://www.nytimes.com/2024/07/12/us/politics/biden-donors-money.html
It's not a particularly vague group. It's a group that the Left used to seem to understand. You can find pieces on it by Chomsky, for example, and over the last few decades written by the Left wing publcation "The Nation."