There's a similar problem with the denominator of that advice. In some cases, sure, it's possible to spend less money. You don't need that surround sound system, do you? No one needs a surround sound system. Why the fuck is sound so interested in being behind me? That's creepy.
You're creepy, sound.
But in many cases, people in serious money trouble are there because they can't spend less money. Your kids gotta eat. Your car needs a new transmission or you can't get to your job. You've tried harnessing your kids to your car, but they're too weak to pull it, possibly from lack of food. So the groceries and the transmission and the stupid, useless harnesses all go on the credit card.
"What's this $248.43 charge from Kidz Tack & Tackle?"
If that describes your situation, then I've got good news and bad news. The good is that, yes, money will absolutely buy you happiness. Having more money will relieve some of the stress that not having it causes, and that absolutely will make you happier. The bad news is that I don't have any idea how to help you. I won't insult you by suggesting that you could work harder. You probably already work much harder than me. And I'll trust that you're grown up enough to adequately separate your wants from your needs and aren't spending more than you need to. So I don't know. Good luck? Try not to get sick, I guess. In the meantime, look for cheap ways to be happy. Sunny days are free. Sticks can look like swords or guns.
Masturbation retains its timeless and thrifty chic.