It's called a "system" normally.

I'm deep and this is 14

Writer Charles Stross once commented that if aliens visited the US, they would see a country that had been conquered by corporations and was now living as an occupied territory with a traitor government (boardroom execs) and enforcers (police).

Capitalism is cancer and it is killing me

I think most people would agree with you but would call it "the economy" since they can't imagine a non-capitalist economy.

And like Quell says, rip open the diseased heart of a corporation and what spills out? People.

(Up to the immune response) thats how you can view society, and is how I viewed it aswell. The best part is you can find it in any part of the world. And regardless of economic system.

I'd say it's more apt to think of capitalism as a parasite that turns all the functions (as you described them) of an organism into something that induces self-destructive behavior that only serves the short-term goals of the parasite - you know, like Cordyceps fungi.