What is a company perk that shows they really care about their employees?

High wages, 30 days paid leave, unlimited sick days.
- High wages is hit and miss, but leave and sick days are just the basics in Europe.
  
  I know, that's where I work and it's amazing :) Even my wage is decently high, and I live in the eternal bliss that if I ever lose my job I won't also lose my health insurance and starve in the street

Salary and time off.
Benefits are great but are limited. I had $1,000 in 'mental health' spending but my therapist nearly doubled their pricing over 3yrs. That $1,000 once got me 10-12 sessions now only got me 6.

I would leave my job if not for: (1) my good salary; (2) flexibility in my schedule.

We have a beer tap in the office.
- This also tells us you work at a company that isn't old enough to have rules in place because the beer tap use... Resulted in unfavorable outcomes haha

Flexibility and a lack of initial formality. I hate hate HR type nonsense. I expect people to follow through in writing, but just interview and talk.
I do not fit into a conventional hierarchy type of job. I just want responsibility and freedom to operate. I will self manage with little input needed and better than anyone will do if micromanaging. I don't like formality. When I need to solve an issue I go to the person most capable of making the change and get it done quickly. People that obsess about rules and hierarchy are narcissistic sadists in my opinion. Those types of people running organizations are incapable of caring for other people.
So I would say, flexibility and a lack bureaucracy or hierarchy are primarily what I am looking for. The rest of the pieces and details will fall in line behind this abstraction.

This is a niche one for US companies that do stock compensation with ISOs, but supporting employees to file 83(b) elections. It's annoying paperwork for the company but saves the employee tons of headache down the road.

Being able to get a normal amount of sleep. Which rules out just about every urban job.
- Where do you live that every job eats into your sleep? Or are you just a night owl that resents getting up early?
  
  I don't live anywhere like that, especially since it's more rural here, but the work environments in the cities near me are very demanding when it comes to putting work over sleep. New York City is just South of me. If you live there and don't have to wake up early for your job, you either have one that isn't a trademark of the city, are just very lucky, or have employers that accommodate to you, which is why they're so big on coffee (basically a daily cup of "walk it off", ~~now comes in mint flavor~~). I'm someone who went to a suburban semi-private-ish grade school and enjoy a uni associated with it who would say she sleeps well, and even just my own sleep inconsistencies were the first thing to mark me as potentially needing modified/special ed class arrangements.
  I look at the rising minimum wage but also the lowering amount of sleep people are allowed to get per job, and I think to myself "there should be a minimum legal precedent for that too", especially if they both can translate into each other. I'm sure the highest employers are as rich in sleep as they are in money.