Content Editor at Open Philanthropy. Opinions my own.
A compromise that I find appealing and might implement for myself is giving a fixed percentage over a fixed amount, with that fixed percentage being relatively high (well above ten percent). You could also have multiple "donation brackets" with an increased marginal donation rate as your income increases.
I doubt an IQ test would be useful at all. One has to be quite intelligent to be a real candidate for presidency.
Probably shouldn't say someone "probably" has an IQ between 145 and 160 unless you have pretty good evidence.
I think it makes a big difference if the preferred theory is gender/racial equality as opposed to fundamentalist Christianity, and whether the opposition to those perceived challenges result from emotional sensitivity as opposed to blind faith. At the very least, the blog post doesn't indicate that the author would be irrational about issues other than marginalization.
I don't see how the fact that the permissiveness principle is only based on one (two, actually, including the third one) of the six foundations would imply that it's not a widely-held intuition.
How risk-averse are you? But even if you aren't, I suspect that right now bitcoins aren't a great investment strictly in expected-value terms due to the high risk that they will decline in value by a lot. No one really knows what will happen, though.
Another possible critique is that the philosophical arguments for ethical egoism are (I think) at least fairly plausible. The extent to which this is a critique of EA is debatable (since people within the movement state that it's compatible with non-utilitarian ethical theories and that it appeals to people who want to donate for self-interested reasons) but it's something which merits consideration.
The US is currently donating doses to other countries in large quantities. Domestically, it has around 54m doses distributed but not used right now. (https://covid.cdc.gov/covid-data-tracker/#vaccinations). Some but certainly not all of those are at risk of expiration. If US authorities recommended booster shots for the general population then that would easily use up the currently unused supply and reduce vaccine exports.