How is bitcoin a trustless currency when you need to trust mining pools not to attack the system?

Look at this article: http://hackingdistributed.com/2014/06/16/how-a-mining-monopoly-can-attack-bitcoin/

Bitcoin could be a trustless currency if there were measured implemented to prevent centralisation of mining power.

We know the current situation is not how Satoshi intended it to be. I think if he didn't go away he would have come up with a solution a long time ago.