No, they are supplied by agreement with the suppliers that is basically component cost only. All the R+D, Marketing and Company cost is passed on to the other products in the range. So the private sector is fully paying the surcharge for the supply to the public sector.
Even the component supply was negotiated to accommodate this surcharge and the suppliers agreed that x% of component supply was provided on a ‘for NHS’ basis. At least it was a few years ago.
To give you a picture of where Costco sits on the wholesale pricing curve, if you imagine that the top end product costs about £1500 plus 20% tax gross wholesale, a negotiated discount of 50-60% might be possible with a good level of exclusivity so £750+150 x 2 plus a charger - going out the door for under £4k. Costco are probably paying about a third of this up front, say £275 inc. tax, plus a charger at a fraction of what we pay.
Sale is £1495/1595/1695 or so, net £1K with no clinic to pay for.
Broadly speaking the Costco model wins on the client volume and the small guy gets squeezed and that’s how they develop market control. Undercut the local suppliers, take the volume share of the pie and kill off the small town businesses that would look after your mother rather than have her travel 2hours to sit in a hypermarket/store: yay Capitalism!