these have lots of meanings, when you have less money you can't do a lot of things since you have to think of the rent and bills every month, what they really mean is that when you are earning enough you don't have to think twice on taking things unlike when you have less.
Rich people really think everything before they spend, because they don't wan't to make mistake that will cost them their fortune.
A lot of relies on this thread seems to tell me people actually think that rich folks do not bother with looking at the piece tag before making a purchase. If they make all purchases without wanting to know the prices, then a good portion of the chunk of their wealth would go towards purchases.
People actually working for their money would have a hard time making wild purchases without caring/giving much thought about the price of such goods. Earning more, you likely don’t have to worry about the price of some goods breaking your budget. That doesn’t mean you won’t know the price.