This very much depends on where you live. If you live in NYC, LA or SF, then this is less than what average software engineers get especially if you count equity that software engineers in big corpos often get as part of their comp.
You can confirm this on https://www.glassdoor.com/
E.g. with the money that @gladstein is getting after 40% taxes, you can reasonably rent a decent 2-3 bedroom ($5k/m), get a car, have some money to travel, etc, but if you would want to own a place or if you need to take care of your dependents, then it becomes harder (without additional income)
Or you could live in a place that is more affordable
True. The paychecks are "normal" for the most expensive places I mentioned, otherwise you could definitely go cheaper.
Since the information is public I think anyone can make their decision on whether the value that HRF (and their employees) provides matches their compensation. Value for value. If you believe they should be compensated less, then don't donate to/via HRF. (use things like geyser.fund instead ;) )
I agree with that. I made this post just to spread awareness so people can make better informed decisions. The number of nonprofits that pay high salaries like these is very disappointing.