The 20% VAT is what we're debating. Nobody knows how many people will switch, and what the fiscal impact will be if they do. If you want £1.5bn, as many of us keep saying, there are less harmful, more predictable, and less divisive ways to raise it.
"If more children have to enter the state system- so be it!" There is no automatic right to a private education."
Well, you've sorted out your and yours in private schools and now in grammars, so screw everyone else. But evidently you're happy with your intellectual contortions, so let's move on.
If "more children" enter the state system they'll be demanding unfunded and, in many boroughs, non-existent places. And they won't be generating any VAT. As little as 5% migration (which the IFS optimistically guesses) means Labour can't fund even their £1.7bn promises so far committed. 10-15% means you generated no money at all - that's to say, you have 60-100k more children requiring education with no extra funding coming their way.
What are you going to tax to fill the gap? Because if you want this deranged policy, you need to explain where the tax revenues are REALLY going to come from.