The whole point of accumulating money is to spend it. Sure, you can accumulate more if you don't spend (I actually sorta doubt it, but let's assume it for argument's sake).

Then, if you live by "the less you spend, the more money you'll have" you'll basically end up having a "big number" on your bank account, but nothing of what you really want.

I'd rather have a super fast laptop and a nice clean apartment, and only $8000 in my account[1], than a crappy laptop and a crappy apartment and $50,000 in my bank account.

[1] assuming I have a steady income, and/or can generate enough revenue so that I can keep getting nice things without draining my bank account.

I said that I doubt the correctness of the logic behind "the less you spend the more you'll have".

I think that to generate wealth, you need to spend some amount of investment upfront, and if you're afraid to "pay" for things, (because it reduces the "number" in your account) then it follows that you don't have the courage to invest in anything, and therefore you are not likely to become rich.