People interested in shifting their careers to doing the most good in a given field are sometimes taking big risks to their reputation, financial stability and likelihood of impact. Worse yet, many people avoid taking those risks. This is understood, and on the individual level it makes a lot of sense, but for the community as a whole it may restrict our impact.
When avoiding risks, it is harder to start new initiatives and go against the consensus. It is harder to throw years of experience away to go to do something which seems more important. It is harder to work on high-risk high-reward projects.
I think that there are several things we can do. Many of which are already being done.
We can improve the reputation of EA and specific cause areas, say by building an academic discipline or slowly gaining more public support.
We can strengthen social support, and build good norms around failures.
We can have financial mechanisms designed for financial stability of individuals in EA. Say, insurance and pension funds explicitly targeting people tackling risky projects and taking risky career decisions who are trying to do the most good.
We can put more effort into improving our network. Taking more time to know people in the community, mentor them, manage more projects and connect people.
We can put more effort into vetting, which directly puts people into our sphere of trust.
All of the suggestions here are for reducing risks for other people.
This requires us to take more risks ourselves, to trust others and spend time and money on helping others with their goals. It requires building better institutions and continually improve our community.
We are already doing great work on this, and I appreciate the work done by many people in the community. I think that specifically in the major EA organisations there seems to have a good capacity for risk-taking. I write this mostly as a general reminder for us all.
At the moment I think there aren't obvious mechanisms to support independent early-stage and high-risk projects at the point where they aren't well defined and, more generally, to support independent projects that aren't intended to lead to careers.
As an example that address both points, one of the highest impact things that I'm considering working on currently is a research project that could either fail in ~3 months or, if successful, occupy several years of work to develop into a viable intervention (with several more failure points along the way).
With regards to point 1: At the moment, my only option seems to be applying for seed-funding, doing some work and if that its successful, applying to another funder to provide longer-term project funding (probably on several occasions). Each funding application is both uncertain and time consuming, and knowing this somewhat disincentives me from even starting (although I have recently applied for seed stage funding). Having a funding format that started at project inception and could be renewed several times would be really helpful. I don't think something like this currently exists for EA projects.
With regards to point 2: As a researcher, I would view my involvement with the project as winding down if/when it lead to a viable intervention - while I could stay involved as a technical advisor, I doubt I'd contribute much after the technology is demonstrated, nor do I imagine particularly wanting to be involved in later stage activities such as manufacturing and distribution. This essentially means that the highest impact thing I can think of working on would probably need my involvement for, at most, a decade. If it did work out then I'd least have some credibility to get support for doing research in another area, but taking a gamble on starting something that won't even need your involvement after a few years hardly seems like sound career advice to give (although from the inside view, it is quite tempting to ignore that argument against doing the project).
I think that lack of support in these areas is most relevant to independent researchers or small research teams - researchers at larger organisations probably have more institutional support when developing or moving between projects, while applied work, such as distributing an intervention, should be somewhat easier to plan out.