Yes, I think this is deliberate, so we are left just as much in the dark as Jonathan. Unlike in 1984, the computers don't change the past, they deny it. It's likely that major corporations have purposely bankrupted the governments of the world, before in-fighting left the biggest controlling everything. Now, rather than compete against each other financially or on the battlefield, they do it through team sports. Nations no longer exist, the people 'belong' to bi business companies and are governed not by governments but by executives of those companies. Imagine the company you work for control your life, constantly surveil you and can take anything from you at any time - even your wife.
It seems to me that Rollerball is very much in the world of Robocop. But it seems that either the world itself is coming to an end, or civilisation is on the verge of collapse, which is why I also consider it to be in a world that will soon be that of Soylent Green.
Interesting take and very plausible . I hadn't through of any of that.
Collapse? It could be that is what happened after Johnathan's victory lap around the ring . You see Corporate guy running from the building , running for his life , that scene could be saying and conveying that world order has just collapsed , to replaced by the mob and the cult of Johnathan.