Gesturing at a thing to mostly avoid. My personal opinion.
This topic has been discussed on the EA Forum before, e.g. Free-spending EA might be a big problem (2022) and The biggest risk of free-spending EA is grift (2022). I also wrote What's Your Hourly Rate? in 2013, and Value of time as an employee in 2019. This piece mostly stands on its own.
There's a temptation, when solving the world's toughest and most-important problems, to throw money around.
Lattes on tap! Full-time massage team! Business class flights! Retreat in the Bahamas! When you do the cost/benefit analysis it comes out positive: "An extra four hours of sleep on the plane is worth four thousand dollars, because of how much we're getting paid and how tight the time is."
The problem, which we always underindex on, is that our culture doesn't stand up to this kind of assault on normalcy. No altruistic, mission-oriented culture can. "I have never witnessed so much money in my life." [1]
What is culture? I often phrase it as "lessons from the early days of an org." How we survive; how we make it work despite the tough times; our story of how we started with something small and ended up with something great. That knowledge fundamentally pervades everything we do. It needs upkeep and constant reinforcement. "It is always Day One" [2] refers to how Amazon is trying hard, even as they have grown huge, to preserve their culture of scrappiness and caring.
What perks say
Fancy, unusual, expensive perks are costly signals. They're saying or implying the following:

Your time is worth a lot of money
You are special and important, you deserve this
We are rich and successful; we are elite
We are generous and you are lucky to be in our orbit
You're in the inner ring; you're better than people who aren't part of this
We desperately want to keep you around
You are free from menial tasks
You would never pay for this on your own—but through us, you can have it anyway
We're just like Google!

Some of these things might be locally true, but when I zoom out, I get a villainous vibe: this story flatters, it manipulates, it promotes hubris, it tells lies you want to believe. It's a Faustian trade: in exchange for these perks you "just" have to distort your reality, and we're not even asking you to believe hard scary things, just nice ego-boosting things about how special, irreplaceable, on-the-right-track we all are.
Signals you might want to send instead
The work cultures I prefer would signal something like the following:

We're normal people who have chosen to take on especially important work
We have an angle / insight that most people haven't realized/acted on yet
We might be wrong, and are constantly seeking evidence that would change our minds
We should try to be especially virtuous whenever we find ourselves setting a moral example for others

(We aren't morally better by default, [...]
Source:
https://forum.effectivealtruism.org/posts/t9e6enPXcH6HFzQku/why-altruists-can-t-have-nice-things
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