Love it. That's such a simple idea to that big, looming problem.
Tackling it sooner, rather than later, really makes sense.

It could be an idea to start the donation drip feed a lot earlier - maybe when block rewards drops into the thousand or hundred sats range - scaling up as it goes.

We've grown accustomed to expect things to be solved by those 'better' than us - swinging in heroically to save the day.

The idea of plebs could starting early to mitigate this problem seems pretty plausible and in a way quite in the spirit of Bitcoin.

BTW I've not heard of this great idea before - care to share some links?