I found a huge improvement in my life by changing how I thought about conversations. I'm in a position (and have been in the past) where I _could_ make large decisions by fiat. But I don't. I discuss them with stakeholders.
In those discussions, I _could_ tell everybody my opinion, and tell them to take it or leave it. That works about as well as it sounds like it does.
I have in the past tried to convince people of my argument, with evidence, rhetoric, emotional pleas, what have you. Those work to various extents, but not as good as I might want. I'm no rhetorician.
Recently, I had an epiphany. The way it came about largely mirrors the idea itself - I had a discussion _about_ discussions (or perhaps, debates). And with a colleague I discovered that my usual victory condition (winning someone over to my side of an argument) was the wrong victory condition. There's a backstory there, but I won't get into it.
What I discovered instead was that I should focus on making sure the most information and understanding was on the table, out in the open.
My victory condition changed from winning the argument, to making sure that I and everyone else involved knew all of the things possible to be known about it.
In the process, I typically find that my original opinion was flawed, the opposing opinion was flawed, and we overlooked lots of opportunities.
You might think that it's easy to get to this condition with brainstorming techniques or something of that nature. But It's not so simple - there are widely known shortcomings to simple brainstorming, and most of the workarounds involve systems to do exactly what I'm talking about on a larger group scale, without everybody knowing it.
What I've found is that I can foster that environment with my own conversation. And that people will reciprocate if its done well, with the viewpoint of the other person(s) in mind. Read "The Entrepreneurial Engineer" for more on that subject.
Why am I telling you this when you are asking what to do about finding purpose, money, satisfaction, and decision making power?
Because none of those things are given away. They are built up of actions you take that affect your world. And you need to definitely start with the smallest of actions. If your coworkers are "dumb" and doing "useless" things - it sounds like there are tremendous opportunities to either A) learn why they aren't dumb or useless (they are after all making "good money"). or B) change things to being less dumb and useless.
But I read another point in your post. Motivation.
Motivation is a tricky one. I probably know and have tried all the things any book or website would tell you about motivation and productivity, because i'm the least motivated or productive person you will ever meet (or at least, I used to feel that way).
I learned something else really important recently. Actually, I re-learned it, it was something I knew in High School, that got me through college, but the lesson kinda disappeared somehow, got sunk.
I get depressed so much more easily than I think I do.
I suffer from constant low grade depression. Perhaps Dysthymia is the right word? Anyway, depression isn't sadness (you can find many places telling you this on the web). Depression is that hollowed out non-feeling. Nothing really jabs the "go" button.
I did two things that dramatically affected my depression, and I will suggest them to you. You may have different composition, and could easily need something different. Talk to a professional (I always highly recommend therapy, and psychiatric if needed).
I stopped drinking alcohol completely (BIG effect) and I started taking 5htp, which is a mild anti-depressant and also non-prescription, so easy to get ahold of, and it steadies things out.
Anyway, I've noticed a huge improvement in my motivation and productivity right away. The old 4.0 engineering student returned, if you will.
So, perhaps really you are putting the cart before the horse here, and need to look inside rather than for external satisfaction of these higher-order needs? Worst case scenario, you will be better prepared to achieve your self-actualization. Which, I have to say, I am in NO position to guess at what it's nature might end up being.