This is even worse than a restricted donation. The nonprofit will live in fear of a loan being called and they'll respond to that risk by spending lots of time

This is even worse than a restricted donation. The nonprofit will live in fear of a loan being called and they'll respond to that risk by spending lots of time appeasing the donor at the expense of using their time helping people, which is likely the opposite of what everyone wants. On top of this, how could a nonprofit make commitments to people (often people in very vulnerable situations) knowing their funding might get called at any moment? If a donor wants this much control over a nonprofit, they should just start and fund one themselves. In terms of nonprofits taking too large of salaries, I'd trust beneficiaries to decide what's appropriate. I often feel like some donors care more about low salaries than they care about how much the people being paid are helping others. I'd happily pay a CEO $1M to create $100M in impact over paying a CEO $100k to create $500k in impact, the latter being much more common imo.