Why does Moist think this way? Context:(From 'Raising Steam' by Terry Pratchett) Nevertheless, once you were bereft of the clacks you thought of yourself as a second-class citizen. Spike was always telling him how enraged clients got about their clacks bills, which were, he considered, not bad in the circumstances; but a kind of ratchet formed in people’s minds: here is the new thing and here it is. And yesterday you never thought about it and after today you don’t know what you would do without it. That was what the technology was doing. It was your slave but, in a sense, it might be the other way round. Question: I know that 'clacks' is some sort of semaphone network, which is relatively new in Discworld. But why does Moist think people have a kind of ratchet in their minds? What does 'here is the new thing and here it is' actually mean? Does that mean people sometimes are unwilling to pay for the new techonology or what?