Not an oxymoron at all. In communism, Comrade Glorious Leader and the Politburo control both the means of production and the monopoly on legitimate violence. In corporatism, Chief Executive Officer and top shareholders control both the means of production and the monopoly on legitimate violence. Different words, same reality.

(In properly-functioning capitalism, the means of production are split between many independent, competing corporations, and the state uses its monopoly on violence to preserve that competition.)