What free prescriptions does do is ensure people take medication, resulting in reduced costs in future
But it also encourages people to stockpile and waste prescriptions because they just tick that they want everything on their list whether they need it or not. In our area most surgeries have signed up to a local scheme designed to prevent prescription waste, so we get interrogated whenever we order. The new system will not now allow patients to authorise pharmacies to order for them, because again they just order everything without checking if it is actually needed.
And there's a huge poster in the surgery of things they will not prescribe and expect people to buy over the counter.