and yes, I know that test actually doesn't work but the point should be clear

The general topic of the persistence of representations of outdated technology in speech and graphic symbols is one that has long interested me. Some still-used pictures of obsolete or becoming-obsolete technologies are: an old-style bell, an old-style metal key of a sort that has been obsolete for a very long time, old telephone or handset, paper envelope (e.g. to represent e-mail), a spherical black bomb, a boat anchor of a certain very old style which modern anchors don't much resemble, a circular 12-hour clock face which used to be used because of how a clock worked, but which is now displayed (when it is) partly for familiarity. And the even older technology: the hourglass! Still used to represent time passing.

I looked for the context of the quote, and it was an impromptu answer to a question from the audience. Clearly, on such occasions it's hard to expect anything else from a professional politician.