I think the problem may be that (at least in Germany, not sure about Switzerland) we've had awareness campaigns about conserving energy and water for ecological

I think the problem may be that (at least in Germany, not sure about Switzerland) we've had awareness campaigns about conserving energy and water for ecological reasons since at least the 1990s. I recall learning in school ca. 2000 to turn off the light when leaving a room, to take short showers instead of using the bathtub, to turn thermostats to 19°C or less, to soap my hands before turning on the faucet and to use the water-saving flush after only peeing. This wasn't related to any particular shortage.