I disagree even with this, though I know it's a common sentiment/expression.

For the first couple of decades of my life, I had little to no to negative money, depending on when we're talking about. Not having money sure was everything.

Since then, I have slowly but steadily improved my financial status. I guess I might be middle class now, but what that means is different to everybody. Anyway, now, I can afford to pay someone to come help me with housekeeping a couple of times a month. I'm also disabled and can't handle it myself. So once again, money is everything.

Even if I reached a point where I was so wealthy that money didn't mean anything, it would still be everything because I would still need it to be paying all of the people who would be helping me.

Yep, there's a certain threshold of money above which has little (but some) bearing on happiness. That threshold is fairly low in the Grand Scheme of things, but if you are below it, money absolutely will buy a certain level of happiness up to that point.

Whether you broke or rich, you gotta get...that.