That comp $ is very reasonable in the abstract, what's not reasonable is comp:revenue. You can't be paying 15% of your revenue to a single individual, because almost by definition they aren't performing well enough to justify that salary.
If that individual is managing the process of successfully getting 1,000 people who volunteer 15 hrs/wk, which you'd otherwise have to pay let's say $30/hr including taxes, then that would be the equivalent of $22.5 million in annual revenue.
Suddenly $285K in executive compensation looks perfectly fine.
In some mostly-volunteer organizations, you will find that most of the money pays the professionals at the top, because you can't get that necessary expertise any other way.
I worked at one once right out of college, at the bottom of the full-time-paid rung, and I had interestingly conflicted moral feelings about it. I spent a lot of time with volunteers and yet I was being paid. But I needed a job, I needed to pay rent. And the tech skills I was providing literally none of the volunteers could do. It made me question whether it was "fair" that all these people's monetary donations were going to paying my salary. But then again, I wasn't the one who set rents to be as high as they were in the city where the organization put its headquarters, and student debt doesn't get forgiven just because you work for a nonprofit.
If you overspend on your salary such that you put the company in a position where the company is begging for 4 months of your salary as runway, you have failed at your job and you demonstrably were irresponsible, reckless in your spending and unable to make tough choices to ensure survival. In other words, you were not worth $285k.
Sometimes organizations simply wind up in impossible positions. Funding dries up for macroeconomic reasons that you have no control over, demand patterns change, etc.
There are plenty of failed orgs that would have failed even if they'd had true business geniuses leading them.
You could just as easily assert that paying someone $285K got the expertise that kept the organization going for an extra 3 years than it would have otherwise, because someone with less expertise would have made a bunch of worse choices that it would have run out of money 3 years earlier.
You seem to be demanding some kind of divine level of perfection here.
Doesn’t seem unreasonable to me. You want high quality people to be able to focus full time on stuff like this.