I disagree, it's death by a thousand paper-cuts.
Having my funds reduced to 91% the rest of the year is waaay worse for me, than having it reduced to ~0% the rest of the month. Because, the rest of that month, I'll be super-vigilant, I'll be acutely aware of why I have less money than normally, I know not to make anymore purchases, I know that this month is not for an extra treat, because I bought the other thing.
Next month I'll be back up to 100% capacity.
This affects my model of my financial situation, because, it's a camera then.. ~91%, it's a new toaster there ~86% and then ~40% and ~20% and now I get into the dangerous "poor" mindset, it's well proven (and I can personally attest to this being a very real effect) that having less money makes it harder to be financially vigilant, there's opportunity cost* for once, but there's also a tendency to "treat" oneself more because things feel tight, there's a tendency to short-sighted savings (the more expensive pr roll toilet paper, versus the cheaper bulk option that has higher up-front cost for instance).
Now, to begin with, I'd go into "savings" mode a month before buying something expensive, so that I'm not at ~0% for a month, I'd never do that.
* Sure, there could be 100% opportunity cost right after paying in full for something, but the recovery to full capacity is also quicker. I really prefer the large, immediate consequences over the smoothed-out slow-squeeze.