These stories makes me wonder why no standard for keeping customer data has been developed. I mean a company needs my data when I buy something from them and th

These stories makes me wonder why no standard for keeping customer data has been developed. I mean a company needs my data when I buy something from them and then again when they have to pay taxex. Do they need to have my full info with name, email and phone number? I could send them the same info again if I want to buy something again .. they could keep some hash or unique id used to check that it's really me. Why is this so hard?