They are all saying nearly exactly the same thing.
Cut taxes to spur economic growth.
We're reliving the 1970s when Britain's Labour Party was a proper socialist one and you could generate growth by being less so.
Unfortunately, that theory doesn't work when you are just dealing with the aftermath of a decade of catastrophes: financial, bureaucratic, health and war-related, where the government intervened as a stabiliser.
The key is not about tax. It's about rejigging the economy away from the protectionist EU and towards the rest of the world. For that, some amount of participation in the process is going to be necessary. You can't expect the market to supply the entirety of the infrastructure required. But you can make a bonfire of aged EU regulations to get any useless impediments out of the way.
Lower taxes at this stage will result in more American style brutallism in the UK. The Schumpeter logic of letting things that are inefficient die to cure an economic problem is about normal recessions, not global supply chains destroyed by a pandemic. I'm not looking forward to it.