We (me, DH, teen DC) do survive on quite a bit less than some of you are spending, but I don't think the actual individual budget is what's most relevant - it's that there have been and still are consistent price hikes, directly as in cost and indirectly with decreasing package size, across a whole range of products and at a whole range of budget/price levels!
Regarding our situation, to keep costs down I meal plan, sometimes cook enough one day for next (not quite batch cooking but same idea), hubby takes smaller leftovers for lunch, have more veggie dinner days and less meat dinner days, shop mostly in Lidl (we only have Tesco, Lidl, Coop, very small Asda, mostly extortionate local on our island), buy fruit in season, me and DH both use soap in shower (own bars - I am still sometlmes using a little nice scented shower gel as using stuff up/sometimes like a little scent).
I find the Lidl washing powder (Bio one with scent) decent and use that and a little of their stain remover fairly sparingly - enough to wash but not smell overpowering. It's as good as bold/Daz (though I'd buy the Daz cherry one if any local shops ever sold it as it smells divine). Their cleaners, washing liquid etc are fine too (though I also sometimes get the Tesco anti bac one).
Lidl own brand soft drinks are fine too, for the odd DC treat, and are much cheaper than branded.