No, because there is no single ideal price for anything. The ideal price varies between customers.

Real world: Customer A thinks the $14 pizza is overpriced. No sale. Customer B thinks the $14 pizza is delicious and worth it. Would pay up to $20 if forced. Pays $14 and enjoys $6 in surplus value.

Ideal world: Customer A thinks the $14 pizza is worth about $6. Buys it for $6 (Arriving at the deal is the tricky part). Customer B thinks the $20 pizza is worth about $20. Buys it for $20 (Arriving at the deal is the tricky part).

Now both customers are happy with their pizzas, and the pizza maker made $26 in revenue instead of $14.

There is no "true" price for anything. It's not morally wrong for the cheap customer to pay $1 in a PWYW deal, and it's not morally wrong for the seller to enjoy it when someone pays $100 in the same deal.