The requirements aren't as strict for money as they are for civil elections. Financial transactions are frequent, so an error isn't that big of a deal in the grand scheme of things. All parties to a transaction know what everyone did; there's no requirement for strong privacy, so being able to roll things back is an achievable (and desirable) failsafe. Money also solves money problems, so you can insure transactions and mitigate losses.

Elections don't have those properties.