It is similar here. Though laws can vary from state to state, not all things are subject to sales tax. Typically only tangible goods are taxed. Basic goods, such as groceries and prescription medicine are exempted, as are rent and professional services.
The idea of a VAT doesn't sound mad. It is the fact that they are 3x the average in the US. From time to time, someone will float the idea of a national sales tax. That gets shot down quickly.
Typically people in the US are opposed to any kind of taxes. Then they complain when the government can't afford to fix potholes in the streets.
They complain because the money that’s supposed to be spent on potholes isn’t spent on potholes. Then the government cries they need more money to fix the potholes. Which they don’t.