No. Stop it. This attitude is consistently responsible for the most dangerous road conditions I see driving in America.
Keep right except to pass. Period.
Everybody traveling the same "maximum speed limit" is a fantasy and rarely exists in reality. There are lots of good reasons for traveling over the speed limit (quickly passing to avoid prolonged travel in close proximity to another car, for example).
Left lane cruisers inevitably lead to long queues in the left lane with empty lanes to the right, which leads to people passing on the right, tailgating, and a host of unpredictable situations that increase the danger on the road much, much more than simple speed (duh, many speed limits are arbitrary and political, not based on some absolute "maximum safe speed", which is a ridiculous notion anyway for roads that carry both sports cars and heavy tractor trailers).
Your prescription creates situations in which it is literally impossible to drive safely (and frankly, I'm sick of finding myself in these dangerous and completely unnecessary situations because of Americans' insane (and sometimes illegal[1]) driving practices...I don't want to race anybody, I just want to get to my destination safely and efficiently). Even choosing to waste your time being the slowest car on the road in the right lane, you end up being put in danger by cars trying to right-lane-pass with dangerous closing speeds up to dangerously close distances.
Keep right except to pass.
1. What you describe is actually illegal in many places: http://www.mit.edu/~jfc/right.html