I'm not in a position where EtG would seem reasonable, but I can imagine the psychological obstacles which would arise if I was in that position. E.g.:
If you're one of the x-risk-oriented people (like me), rather than, say, global-poverty-oriented, your money wouldn't typically go to people who are much worse off than you, in Africa and elsewhere. It would typically go to support people like AI and generalist researchers, content creators, event organizers, and their support staff—people who are notably better off than you. They spend their days doing work which feels meaningful and enjoyable, often they live (and pay rent!) in the Bay Area, surrounded by fellow EAs and Rationalists, and they enjoy the high social status that the EA community assigns to people who do direct work.
Meanwhile, you spend 8 hours a day doing… well, a job. The people there might be nice enough, but probably not exactly your kind. You're probably working on something that (roughly speaking) doesn't matter. And your future prospects are gloomy: if you really give away a significant portion of your income, rather than saving up, you'll keep toiling as a wage slave for deeecaaadeees before you can afford to retire.
This is indeed something that might make rational sense (if you're somehow particularly ill-equipped for direct work), but it just feels… unfair?
I wanted to write something similar. I saved up the money that I donated by buying cheaper food and living in cheaper places. It all felt a bit pointless when I saw that the orgs that I donated to spend some of that money on fancy offices in expensive areas. But if I remember correctly, it wasn't a big deal as I continued donating to them. I thought that from an utilitarian POV it could be the right decision on their part.
I also want to say that I'm not sure that I now enjoy my job as a researcher at an EA org more than I enjoyed earning to give as a programmer. I thought that doing something directly meaningful would be much more enjoyable and make me more motivated day-to-day, but it's not happening. I think that what matters more (at least for me) is the nature of the task and whether it's easy to get into a flow.
As for social status, I always felt that even in EA circles (e.g. at EA Globals) it mostly depends on how charismatic/socially smooth you are and that what you do for a living has little impact on it. Maybe it's different in places other than the UK, I don't know. I guess I'm saying all these things because I want to show earning-to-givers that the other side might not be as glamorous as it can seem.