Not the material aspect of what it can buy - but the freedom to not have to work is where the big boost of happiness came from for me, though I cannot guarantee it would for you if you truly love your career. For me, programming was always just a tool, a job, a means to an end. Sure it's kind of interesting, but there's far more interesting ways to spend my time.

Also, I hate bosses, performance reviews, bullshit non-producing jobs who make up the majority of your tech peers, commutes, forced social small talk with people you don't like, etc. So even if I 100% loved what I did everyday, I wouldn't like all that BS that comes with it.

Now, being able to spend my time as I please with full autonomy - that is where the incredible boost in my happiness has come from

I guess it depends on your job. I have significant control over what I do and at least a decent chunk of it is stuff I would enjoy doing anyway. (Normally) I like to travel and like having a lot of interactions with peers at my own and other companies. Bureaucracy is annoying but not overly so. Not to say I won't retire--I will--but I'm also not in a big hurry and could probably negotiate some incremental time off if that became a big issue.

Agreed, freedom and autonomy to do what I want and like is what really makes me happy and money is simply a means to that end. I'm still just getting started and nowhere near where I want to be so the hustle continues...