If it landed with you that way, then I didn't write it very well. That's not what I meant. Being poor, which I was for a long time, means only that you don't have money at that time. I believe that whether you think you can improve your current 'poor' situation or not, you're right. And you're 100% correct, people with a lot of money can be very poor at managing it. They've fallen into the trap of spending what they make, and many live big paycheck to big paycheck.
Tips? Sure. #1 and most important, once you have enough money that you don't consider yourself poor, even if you don't consider yourself wealthy, STAY OUT OF DEBT.
Tip #2, Don't just cut up your credit cards, burn them. Don't buy anything unless you can pay cash for it. Houses are the exception, not cars.
That's just two easy ones. But you see my point; no matter what it takes, stay out of debt.
When I was poor, I even tried going to one of those debt consolidation places. They told me that in order to help me, I'd have to provide them with a list of my creditors. By that stage, all my bad debt had been sold to collection agencies. I had no idea who was after me, or even for what debt when they would call and harass me. I stopped answering the phone. I hope those services are better nowadays, because at that time, it took some serious self-convincing to go there and try to get some help. That motivation should not be wasted, but it was in my case. So yes, I definitely had poor money management skills. I was lazy too, but I don't think there was any causal relationship between the two.
Getting back to what I hope is the core of your original point, nobody taught me anything about managing money when I was in high school. I think that for high school kids, a course in money management (at least a full semester) should be mandatory. Don't try to brainwash them, but give them the facts about credit cards; the supposed benefits and absolutely the numerous pitfalls. Explain to them the insanity of the minimum payment. Of course, many will still go into debt even if they have a class like that, but then it's entirely on them.