"Those invitations are akin to subpoenas, so yes they were forced to appear and answer questions."
Yes, and its about time. With global warming soon to make planet Earth uninhabitable for humans in as little as 200 years, massive amounts of money will be needed to radically change the infrastructure associated with energy production and delivery and transportation and manufacturing. Since only a tiny fraction of the world's population really has any money, humanity will be forced to get it from the tiny fraction of the world's population who do have money.
The question is will the ultra-wealthy be a willing part of the process to save Earth for humans or will it ultimately be necessary to take it from them by any means necessary? I would suggest that at the present rate of warming, there is perhaps only a 10-35 year window in which the tiny fraction of the population that has all the wealth will get decide whether they will cooperate or conditions will determine their fate, after that it will be everyone for themselves. One thing is for sure, as the crunch to survive becomes far more brutal than it is now, those with the money are going to have an even more difficult time trying to find a place to hide it or even hide themselves. Unless the ultra-wealthy are prepared to nuke entire populations, there simply won't be enough soldiers for hire to save themselves and as we all now know, the enemy of your enemy is not always your friend.
In the meantime, the rest of us can try to figure out what side we will likely be on. Of course, soon if we have not already made our choice, it will be made for us. The impact of global climate change in an 8+deg C world will pretty much dictate the limited choices the humans that remain will have.