So, whatever they wrote about is framed by their experience and understanding of reality. As part of the class that believes it is right to manage us, do you think that they were trying to warn the proles about the future? Were they trying to help us live a more meaningful life?
They were not. Their works were not a service to mankind, they were not warning us about the future or that old trope. What they were doing is putting down in writing their best understanding of the plans that were in store for us. It was a mental exploration of how future management might pan out, what it might look like.
I suspect that this writing was partly as a tool to give to the upper/administrative classes so that they had a clearer goal in mind. I also suspect that these works were disseminated more widely, as a population that is aware of the ideas does not respond in shock and reject them - mentally they have acclimatised to the future horrors. (Aka Predictive Programming.)
If this sounds implausible, consider the fact that Aldous's brother Julian, created UNESCO. His grandfather Thomas played a role in establishing the theory of evolution (which in many ways provides a biological justification for the role of the elites as 'they are the fittest'). George Orwell's actual name was Eric Blair - and of course there is a famous British politician - Tony Blair. (It is claimed they are not relations, but it remains possible - how can we know?)
The books themselves are purported to be set in the future. However, it is possible to read them in a different light (as I suggest above) - as a sort of visionary guide for those administrators of the 30's and 40's. This is to say, that a lot of power was already in existence then. Eugenics (a feature in both books) was an overtly accepted ideology of the upper classes at the time. The nazis made the term unfashionable, but there is are reasons to think that this ideology is still popular amongst the self-proclaimed elite class.
In direct answer to the question, I think the elites would prefer us to self-select our future slavery along the lines of BNW - we can have moral degeneracy (its already here!) drugs (ditto) and just do our epsilon/delta jobs. However, Orwell was right about the talking screens, and ultimately if we won't self-select our slavery there is a harder form soon available - Chinese credit scores (aka bio-medical-ids/crypto-wallets) which thanks to the technocracy we have been working hard to achieve (esp in IT), will mean some of us will be locked out of life in the system. So, its a mix of both visions.