The link between nationalist imperialism and corporate policy is something that requires a strange view of capitalism to exist in as corporations routinely exist as extension of the hegemony of nation-states even when such activities are contradictory to the larger national interests. I live in Appalachia and our local mythology is of coal mines repeatedly destroying themselves insisting on maintaining their power over the working class and destroying all potential rival businesses even when it would be more profitable in the long term for its efforts.
I suppose it's a regional thing as the churches, local governments, and corporations (coal, tobacco, and oil-- are all based around exploitation of natural resources) are all heavily intertwined that they share a fundamental ideology. Which is to say that Marxist theory requires the corporate overlords to be purely self-interested materialists as well when plenty will devote vast amounts of their resources to maintaining a heirarchy of racism and culture for reasons beyond.
But I'll be honest, the show's biggest failure is that it massively downplays the role of the government in what I assume is a deliberate attempt to be more marketable. Hence why there's no mention of China (Amazon Prime is available in China) and the US government is seemingly given a pass despite its reactionary leadership being behind it.
Which is to say I don't disagree the show is cowardly and misrepresenting the Fallout world.
Why try to rule the whole world when you're already part of the world's ruling class? Boredom? The Enclave had a genocidal ideology because it was a representation of all stakeholders in the US government, with their own national idea and vision for the future. It was a patriotic deep state invested into the office of the president who thought America had failed them, the same way Hitler thought the Germans failed him. A boardroom of corporate suits only has vision for quarterly returns.
You're the one who pointed out the nature of the capitalist system is continuous expansion until it explodes. There is no stopping the running up the stair case as there's no "end state" where "enough is enough." In the case of the board room, they have to continue working to expansion of their stakes and resources. Vault-Tec is formulating an alliance of people to survive the apocalypse and maintain their position post-War.
I take the way it goes like this:
1. There's a 90% chance of a nuclear war
2. All of the people here have been invited to prepare for that at significant financial risk but guaranteeing their survival and the survival of their position post-war as the new/old ruling class.
3. One asks, "what happens if it doesn't happen?"
4. Mrs. Howard points out they can guarantee the war happens, meaning none of that effort goes to waste.
Now 4# seems insane but its perfectly understandable from a stock orientated perspective of controlling the market. There's still a 90% chance of the crash happening either way but this way guarantees that events will proceed as Vault-Tec and its conspirators want.
It's a controlled crash.