The point is, what we need is quality, regardless of whether the price is expensive or cheap, especially when you already have a lot of income or are already rich.
I think we don't need to be too thrifty or restrain ourselves from necessities except for buying useless things as long as we have money then we have to fulfill all our needs and desires with the best things.
When we are rich or have a large income it doesn't mean we have to save excessively, that's what we have to remember, giving the best things is also an appreciation for ourselves after being able to do many things, so I think it should be done for yourself.
I feel like buying one expensive high quality thing, is better than buying ten cheap low quality thing. Because if you buy once, and keep using it for many years, then you are actually getting cheaper per usage from it.
For example I have one item of clothing, that I owned for ten years now, still as good as brand new, and yet we are talking about something that is so expensive, it was nearly like one month salary back in those days, probably worths around the same now as well. If I had bought something else, something very cheap, then I would have probably ruin it by now, and would have to end up buying many more times, which is why I think it is smarter to just one high quality thing for once and not repeat it again.