If you charge someone say £10 that would have been the price that you are happy with based on what you want to earn. If the customer is just as happy to pay £12 after adding VAT, then you havent lost anything have you. Yes you could say i could of charged him £12 and had more profit but you didn't in the first place.
Maybe think of it this way then....
You pay 29% on profits currently, then the government will squeeze another 20% on top of that in added vat.
Your sweat and graft from a business that you built from nothing is turning out to be a nice little earner for the taxman.
Meanwhile you are no better off, and likely worse off due to less cleans per year.
But The Palace of Westminster will be extending the wine cellar, fitting diamond encrusted chandeliers and applying Gold Leaf to the interior walls.
Tory MP's will be giving themselves a pat on the back and a pay rise....