They know it exists, they don't know how it works or why (unless they run a business).What? It's just a percentage. You don't need to be a business to understand that.
...which is exactly what I mean by "hiding it". [...]
That's not hiding it. Companies can (broadly speaking) also show ex-VAT prices, should they choose, they are just obliged to show the inc-VAT ones more prominently. People care about the end cost, I'd guess if you polled people, they'd overwhelmingly choose the inc-VAT display over ex-VAT.
Also, in the UK, your receipt will show the breakdown of tax and may also highlight tax-exempt items, so if you really care for the details, you can see them.
The american approach to sales tax, which seems complicated and "magic" at first, is actually much more transparent.
Again, I'd wager that the actual costs are the ones that consumers want to see, not the pre-tax prices. Do US customers really sum their trolley of goods in their heads and add on the exact tax % to know how much they are spending before they hit the tills? Which is more convenient?
Nope. It's regressive because it's flat rate
Um, I'd suggest that you look up the definition of a 'regressive tax', you appear confused. 'flat rate' or 'proportional tax' is _not_ regressive, again by the very definition!
[yacht ownership discussion snipped]
because in the end it's paid only by fixed-income n00b employees who can't justify a VAT return.
VAT return? End customers have no VAT to claim back. They are people that pay it! Now if you are running a business, and so have business purchases, then obviously you need to be aware of tax regulations. If you are a 'n00b' employee then you pay it.