For things that are super good, super useful but not profitable nor predisposition for voluntary support how does a community get those things? Especially those

For things that are super good, super useful but not profitable nor predisposition for voluntary support how does a community get those things? Especially those within the community whom might not afford otherwise? And especially when the lack for them causes cascading affect to the whole of the community? Seems to me an outbreak of disease by the poor surely effects the whole and that we all would do well to pay a "tax" to prevent that?