Do you think that there should be a blanket prohibition against causing harm to other people by making false statements, even if the person making the false sta

Do you think that there should be a blanket prohibition against causing harm to other people by making false statements, even if the person making the false statement doesn't gain anything by doing that? This would be a stronger prohibition against libel than (IIUC) is present in US. I also don't see how it could interact with investigative reporting -- a reporter often cannot prove his statements without breaking the confidentiality of his sources.