REALLY??? In what ways do you assume it is "far worse"??
Since the higher percent of 30, is probably what will be used, that also would make people in lower tax brackets ( forget about that prebate, it isn't enough to offset the FT's final cost!), they would automatically be bumped into a higher tax bracket and things such as bus, train, and taxi fares would rise. So would the cost of gasoline, for those who drive.
Most people don't raise all of their food. Immediately their grocery bills will skyrocket.
Yes, there will be a prebate, no prices won't come down, and people always holler when any price is raised; remember what happened with the price of gas? And just because they won't be paying an income tax, it's the price shock, when buying something, that they'll look at!