Constructive question and answering this properly might take a few years and a couple of thousand pages. Tax legislation isn't done by forum posts. However, in

Constructive question and answering this properly might take a few years and a couple of thousand pages. Tax legislation isn't done by forum posts. However, in generic terms. Financial transactions are audited by enforcing the use of a ledger, with rules for how all transactions must be entered into the ledger. Auditing data transactions could be implemented in a similar fashion, by demanding that all data usage is entered into a ledger, and that evidence is produced that the rules are followed. It could be similar to what EU is doing this with GDPR. GDPR can be audited and it is purely related to what is being done with data. Modelling a "data usage" legislation on this type of existing data legislation could be possible. Precisely what would be taxed is perhaps not the core of my message. However, taxes have side effects: companies wants to minimize taxes. If society would like to minimize the use of personal data, a tax on personal data use would have such an effect. Unprofitable use of personal data would decrease.