A VAT is no different from any other tax.
And, of course, it can be raised by a greedy government -- just like any other tax. That is no reason to condemn it.
Cruz's plan imposes the VAT in place of the current income tax. In other countries, the VAT was imposed on top of current taxes. That's what made VAT so damaging.
Unless it is forbidden to have both, we'll end up with both.