It’s always thrilling when somebody looks at the Way Things Have Always Been Done, and then asks: Why?

And then goes on to change the world forever.

1967: Why is it necessary to wait in line for a human teller if all you want to do is withdraw cash?

1974: Why shouldn’t your document on the computer screen look the same way it will when it’s printed?

1991: If shampoo always settles to the bottom of the bottle, why is the cap on top?

Recently, a San Francisco company has been asking an equally groundshaking question: Why can’t everyone accept credit cards?