I’d assume

That’s the thing, your view of humanity is rather idealistic. Most people are too cynical to assume that other people will help them out of the goodness of their heart. Not to mention that there are loads of people who indeed WOULDN’T help simply because someone else needs help.

Also people with disabilities aren’t helpless and can still be useful to a community

Obviously. But “making it public knowledge what requests each individual member has contributed” will inevitably lead to scrutiny of people who don’t contribute as much as others. That’s where you’d need to decide whether this person (who seems to be receiving more than they’re giving) actually cannot do more than they’re doing or whether they’re abusing the system.