The main counterargument was that the world might change in a way that makes donating in many years less valuable than donating right now. An obvious example would be if we have transformative AI very soon, completely changing the economy and the x-risk landscape, or another example would be if the world ends, but this could also be if you think certain investments in global poverty would outperform most financial investments (Phil is not convinced but you might be).
Phil Trammell argues the same thing (that patient philanthropists should look somewhat more favourably on earning to give than people who want to do good immediately) in this podcast. https://80000hours.org/podcast/episodes/phil-trammell-patient-philanthropy/
The main counterargument was that the world might change in a way that makes donating in many years less valuable than donating right now. An obvious example would be if we have transformative AI very soon, completely changing the economy and the x-risk landscape, or another example would be if the world ends, but this could also be if you think certain investments in global poverty would outperform most financial investments (Phil is not convinced but you might be).