'Costed' is one word for it. All I see from Corbyn is some vague promise that he will negotiate a new and fantastic EU deal, despite being told repeatedly that the EU wont do this, and some unrealistic and quite ridiculous taxation revenue claims to support the largest spending plans most of us have ever seen. If, as pretty much every economic expert in the country predicts, it doesn't work as planned, we will be paying for it figuratively and literally for the rest of our lives.
Labour play all the same tricks and games the Tories do. In an echo chamber you just don't see it.