Big money interests have always played the biggest part in superior, privately spec'd engines from beingallowed by the sanctioning bodies. When one side realizes it can't keep up with the competition, it lobbies to have the competition's tech handicapped...or disallowed. Happens all the time in just about all major motorsports.
IMO, innovation should drive the competition...not tons of inane restrictions on the engineering and design. This is why NASCAR is no longer true "stock" car racing.