I think you'll agree with me in saying that the idea of a Revolution in the US or most other Western countries is 'beyond the horizon', that is, very obviously not happening any time soon, and that they have no reason to fear the guillotine. Thus such a compromise has no potential benefit for ... 'ruling class'.
You're quite right! The slaves are well under control, and there is little hope. However in theory it is possible the controllers could be hurt in some way, some day. After all the fact remains that there
have been revolutions, and ruling classes have been slaughtered/forced into exile before.