It ebbs and flows, on both the income and the spending side.
I spend any money that comes in from a variety of sources - part time gig, tax refunds, gifts, taxable dividends. Since those are all taxed income anyway and money is fungible, it's simpler to just spend it rather than invest those dollars and sell other dollars to spend.
If income is more than what I need for the next few months, then I invest the extra. If income is less than what I need, which is the more frequent case, then I sell some stock in taxable. I could also draw from my Roth pipeline if I wanted to. And next fall I might start an SEPP for tax reasons.
And taxes can be a mostly disconnected separate exercise. As the previous poster implies, the peculiarities of the tax code mean that I generally optimize my taxes and cash flow separately. I generally realize more taxable income than I need right now because if I don't, I'll pay a higher percentage later.
Overall I also monitor how I am doing on a WR% basis. For most of my six retired years, that metric has suggested I can spend more.