The majority of economic activity is not "programmable"--if I order a ship load of steel from some country, how is that contract going to be enforceable/verifiable with cryptoeconomic techniques?
Additionally, finance is what controls and directs the economy. It is the business of money itself, in both the public and private sector.
Banks play a central role to any economy. Digital currencies can be centralized and controlled in the same way as any state owned enterpeise.
Not sure how that all can be trustlessly secured with blockchain technology
[0] - https://statistics.rice.edu/news/student-founded-blockchain-...
You may also want to see these for more info:
https://www.forbes.com/sites/darrynpollock/2020/02/27/blockc...
https://www.businesswire.com/news/home/20201203005110/en/Tra...
Presumably the shipment has a series of checkpoints, which add some amount of traceability. There's also the potential for insurance for blockchain contracts.
I only recently learned about oracles, but I suspect we're only getting started on unlocking the potential of blockchain.
If there are oracles making the progress at each checkpoint along the way available from the blockchain, and insurance contracts for potential disruptions at each stage, your contract can ensure payment on delivery, and the supplier can be insured against any disruptions.
edit: I think this is a valid thing to tackle potentially as a company, but right now it seems impossible.