Yet, some of the unhappiest, most depressed people I know are poor. Being poor doesn't make you happy. You don't have to be rich to be happy, but you do have to be fairly solvent/have a good amount of surplus income at the end of the month... EG, be in a position where a £700 car repair bill - or a £900 vet bill wouldn't faze you much ...
Money doesn't necessarily always bring happiness, but the lack of it can often bring misery. Knowing you can't afford to pay the gas bill unless you use your credit card to pay it, and constantly living in your overdraft, and robbing Peter to pay Paul is no way to live. It's stressful and life limiting, and causes depression, and unhappiness, and big problems in relationships,
DH and I are the happiest and most comfortable we have been for many years, because our income is approximately 2-3 times our outgoings, we have a savings pot with a sum in the low-mid 5 figures, and we have no dependents. If we wanted to spend £4K on a cruise tomorrow, we could, and would still have plenty of money left.
15-20 years ago, we didn't have a pot to piss in and were always struggling to pay for the most basic shit. We dreaded the car MOT because we knew we'd have to pay for it with the credit card, because we NEVER had more than £55-£60 in our savings account. Our 2 children always needed money for something, and we always seemed to be forking out for something for them.
We have been so much happier, and healthier since being better off financially, and have NO DEBT. We look more fresh-faced/younger and less stressed too. I would never in a million years want to go back to living hand to mouth, not a pot to piss in, robbing Peter to pay Paul, £25,000 worth of debt, and fifty quid in our savings account!