Do you believe that altruism actually makes people happy? Peter Singer's book argues that people become happier by behaving altruistically, and psychoanalysis also classifies altruism as a mature defense mechanism. However, there are also concerns about pathological altruism and people pleasers. In-depth research data on this is desperately needed.
I'm not very confident on this topic. I was also evaluated as a very weak-hearted and sensitive person. I don't think it's up to me to discuss whether they exist or not. But it's very difficult because HSPs are a shield for many people. I have observed something close to “covert narcissism.” I would like to point out that they tend to describe themselves as "competent and in need of protection." They want to be overly privileged.
It is like a seed. Basic trust and support are provided. It is doubtful whether long-term, indefinite provision is necessary. Wouldn’t it be similar to UBI? I don’t know because there is no research. I believe you are begging the question. I can't agree or disagree with the claim that it will soon return to its initial state without any long-term effects. As for the estimate... I'm not sure. I can't think of a good measure or anything yet. I might need a psychologist to help me. Perhaps an estimate for mental health or well-being, but I doubt QALYs or DALYs. But as an initial estimate, it seems like a good measure. Alternatively, it could be expressed as pain relief or social support. I confess I had no intention of doing any serious research, as I was simply asking for an idea. It's more of a question of whether it's worth it.
I recommend <The Age of EM> by Robin Hanson. Although it deals with realistic predictions rather than normative facts, it is worth considering.