Two problems:
1. How is it broken? As I and others in this thread attest to, the thing that makes open source so powerful is, in fact, the lack of legal and moral obligation to do anything in exchange for the right to use the software. Not having obligations is a two-way street. Same for donations; donations do not give you any additional assurances.
2. If it is truly broken, then what is the solution? Nobody has really offered any solution, that I can see. If the solution is that everyone rushes to support a project the moment it hits the news, that's not sustainable. It's good that log4j and its maintainer(s) will get more attention and hopefully funding as a result of this snafu, but it's not a sustainable solution to a problem.
(As a clarification, I am not implying that the answer is "it's not broken." I certainly do agree that open source is underfunded, though I think this is more of a procedural issue than anything.)