@ raging.
Blimey. If word count mattered this argument would have been over a long time ago.
Firstly you may wish to check where I claimed that reducing the Corporation Tax rate would necessarily increase the tax take. I haven't, so it seems a little harsh that you demand that I produce evidence of the same. In reality it is a continuum. A 0% tax rate would have companies flooding into the UK but no tax take. If the tax rate was put at 100%, you'd receive money only for so long as it took for businesses to close down.
It is impossible to conclusively demonstrate that any particular model produced a particular effect because economies are so complex making it necessary to have two identical economies and do a in one b in another to be certain of the consequences of both.
What it is possible to do is see what happened to the UK under the last Labour government that ran a significant tax and spend strategy in the 70s and what has happened since in the economy where you have the JRF report linked to by MMM, which confirmed the progress that was made at reducing poverty in the UK until the 2008 crash and the austerity that followed.
And despite the post 2008 malaise enough jobs have been created in the UK to effectively deliver full employment despite the continued influx of UK migrants.
You are wrong to suggest that it is a certainty that raising corporation tax X amount would raise X amount for tax revenues. It isn't a fact (or a FACT as you put it for some reason), because business will respond. They have a fiduciary duty to their shareholders to do so.
Is their evidence that companies take tax rates into account when deciding how to operate? Of course there is. Take Starbucks (if you like fairly dull coffee). They used a licensing arrangement to effectively export the profit on their UK operation to the Netherlands in order to take advantage of lower tax rates. That's one way of responding. Another way to do so is to quit the country. Is there evidence that companies would at the very least consider doing so. Yes - in recent weeks we've had companies queuing up to warn of the consequences to their UK operations if Brexit imposes additional costs upon them. There is no reason to suppose that they would react differently to additional costs imposed upon them by a Labour government.
Strangely, despite proclaiming your fact (or FACT) you then go on to concede
I'm not trying to hide that it gives birth to uncertainty about how businesses respond, and this has to be weighed up in the decision a government will have to weigh up. I don't claim to have evidence that NO jobs would be affected by such a raise, which suggests that your fact isn't a fact after all.
Your concession leads to two questions:
1.What changed to move you to uncertainty from your earlier confident assertion (of fact?) that the Labour tax plans would lead only to (as yet undefined) changes to operations falling short of quitting the country?
2. Given that you now accept the possibility of job losses, how many would you consider acceptable for the tuition fee bribe?