I’m not sure it’s key to mutual aid that people are similar demographically, I’d say the key point of it is to share resources unconditionally. A traditional charity does not give unconditionally, as they gate-keep who is or isn’t ‘deserving’ enough of help (that’s not to say that traditional charities can’t do great work of course). Mutual aid also recognises that different people’s needs might be different: one person might need financial assistance to avoid eviction, another might need a second-hand mobility aid, and another might need a hot meal brought over a few times a week. So the aid is mutual, because the same people might be recipients of some types of aid and givers of others, if that makes sense.
I’m not sure it’s key to mutual aid that people are similar demographically, I’d say the key point of it is to share resources unconditionally. A traditional charity does not give unconditionally, as they gate-keep who is or isn’t ‘deserving’ enough of help (that’s not to say that traditional charities can’t do great work of course). Mutual aid also recognises that different people’s needs might be different: one person might need financial assistance to avoid eviction, another might need a second-hand mobility aid, and another might need a hot meal brought over a few times a week. So the aid is mutual, because the same people might be recipients of some types of aid and givers of others, if that makes sense.
GiveDirectly makes unconditional cash transfers so that sounds like what you are looking for?