Modern plumbing, freshwater, and waste removal is literally one of the top five inventions of all time for increasing lifespan and quality of life. You don't realize how good you have it until you go try to live in a village that doesn't have freshwater or wastewater disposal, where you have to trudge miles per day to fill up large heavy containers from sources that are already polluted anyway, and that needs to be further treated with boiling before it's safe to use.

So in that context, it's absurd to think that £1 per day is steep to get all of those benefits. Back when I had a house our water bill was way more than you're paying, and I would've been willing to pay way more still. Having fresh safe water available at the flick of a tap whenever you need it, and all waste products disposed of without spreading contagion, is a modern day miracle.

Rather than a miracle it's a partially solved engineering problem. Using potable water to transport poo seems rather wasteful, when a low tech composting approach is rather simple.

Or perhaps the sewerage network should be replaced with a multi-purpose, transport network, or some other innovation.

You can process your own waste by pumping air basically through black water, all very good. But at the same time you can just throw a turd on the compost heap if you have the room, and nature will do its thing, and you'll build up your soil.

Education of good habits and some simple practice goes a long way.

Separett Privy 501 is a toilet seat that makes it easy to keep liquids and solids separate.

http://www.greenevelien.com/1Eco_3water.php#composttoilet

I'd have thought that was quite simple. My partner however has IBS, and each sitting is a shit storm. They have no control and that wouldn't work for them apparently. That's the biggest barrier for us.