I’d like to see a source for that.
Food - https://lsa.umich.edu/lsa/news-events/all-news/search-news/the-diet-of-pyramid-builders.html#:~:text=Redding’s team made the discovery,smaller number of pig bones.

Buildings, conditions, etc. Sources at bottom - https://historycollection.com/this-is-what-life-was-like-for-an-egyptian-worker-building-the-pyramids/

Man that’s even worse than the bread and beer thing. “You’re not slaves because when you die on the job we bury you in a better hole!”
Being buried near their pharaoh was a huge honor for them, being buried near their actual god incarnate. It would be like christians being buried near Jesus. A key part was also that they were actual tombs (not just holes, actual crafted tombs and burial chambers) plus they were stocked with things they would need in the afterlife, neither of which would be done for slaves.

Plus, many workers were farmers who would work on the pyramids during their off-season then go back to their families/farms at the end of the season (see the sources above)