Reading your comment made me think of an ad i saw several years ago.

It was an ad that started off like a typical quality coffee ad, nice pictures of beans, people harvesting, some roasting etc. But than it switched to the topic if making sure that "fair trade" was really applied - switching to IBM Blockchain and claiming that through the use of Blockchain there is safety that everything went fair trade.....

And i just thought.... sure... your blockchain approves that those workers harvesting got paid fair... or does it? All it actually does is proof that someone inserted the information that they got paid fair. If it really happend? Noone knows. Therefor Blockchain is a representation of what you feed into it nothing more and nothing less. At the moment it touches real life - as in the fair trade/payment for coffee bean harvesting - especially in countries where alot of payment is still for dayjob/cash - there's no way the Blockchain can assure that everything went the way it is stored as.