I don't have a TV but heard about this on the radio, whatever you read into how it is worded (promise/suggestion) I wrote it off, as far as I know none of the people campaigning in the bus with this written on have the power to actually do that.
Are you not concerned that people with no power to act on the claims they are making in their campaign are able to make them? Clearly there are a lot of people that believed the claims.