What is an HEA?

Can you give an example of the sort of prediction market you’re referring to, or what kind of consequences there have been?

Is donating via payroll deduction a simpler way to achieve this result?

Here’s a summary of UK tax treatment of charitable donations. As I understand it, donations are sometime deductible, and sometimes eligible for gift aid, but never both.

GWWC has a somewhat complicated treatment of gift aid; you can count gift aid towards your pledge, but

If you are counting Gift Aid towards your pledge it is recommended to calculate your pledge amount based on your pre-tax income. If you are not claiming Gift Aid or any tax benefit then it is recommended to calculate your pledge amount based on your post-tax income.

The evidence is quite strong. You can most likely get more detail than you ever wanted from the GiveWell review.

It is also highly controversial to state that charity doesn't begin at home

Completely different scale. Not that we can determine what is true/correct by polling; but 29% of people chose to give internationally, while I would wager less than 1% would endorse the view that we should let humans suffer and die because otherwise they might eat animals.

My impression is that most EA oriented charities can already accept tax-advantaged donations from most countries via intermediaries. Is there a particular country/charity combination you are thinking of that is not currently possible?

New Incentives

Interesting idea. Even more so than for the 10% pledge, it seems to me that this one should be based on after-tax income, since otherwise getting more income could leave you with less spending money.

I disagree-voted, rather than downvoted, but I could understand downvoting on the basis that, like so many animal welfare pieces on the forum, this one smuggles in a ton of unstated and highly controversial beliefs about the value of animals. I feel like pieces like this should come with a disclaimer at the top saying, “warning: this essay rests on highly unconventional beliefs about the value of animal welfare”.

Personally I find repugnant the idea that we should let little kids suffer from malaria because of the chance they might grow up to eat chicken. The same logic could be used to justify school shootings.