Indeed... also what has how has the recipients tax affairs got anything to do with the person paying the bill?
Not only that, what are the alternatives? They can either take a cheque at a huge risk of not getting paid, or they can shell out hundreds a quarter to their bank for card payment facilities and a merchant account.
That is already the case here... or at least HMRC would have you believe. If you "give away" a service that you would normally derive income from, they still expect you to pay the tax on the notional value!