On UBI - I was having that discussion a few weeks ago elsewhere, and ran some maths (without looking at the potential benefits, or risks of UBI - the discussion had largely covered that already, but decided that affordability was simply not possible without doubling HMG's tax take)...
I'm running on the assumption than UBI would be set at a pretty basic level, at least initially, enough food, housing, gas/electricity and broadband. If you want a big TV with an expensive monthly contract, or an overseas holliday - you can still get a job. With UBI, other forms of government support would not be necessary.
UBI would replace pretty much all other welfare payments (some disabled would need higher UBI). So that's
£275B already accounted for.
It would also remove the need for the "personal allowance" 0% tax bracket, so the first £12k of income for
37M people (it'd be less because plenty work, but earn less than £12k - but we're doing approximations here) - so that's another £444B. Essentially, UBI becomes the personal allowance - it's tax-free, anything earned above that, is taxed.
DWP is currently the biggest department of HMG, with 80,000 employees, Staffing costs around
£2.6B. A massively simplified UBI would need less than 1\10 of this, so there's another couple of billion on staffing, let alone all the other costs associated - especially London offices. Negligible for these purposes, but allows a little leeway for our margin of error.
Either way, we've can put somewhere around £700-722B into a pot to be redistributed with UBI. If we "simply" did that, and didn't touch the rest of the tax brackets (though I would anyway), for a population of 66.6Million, that gives us £10,510- £10,840 for every man, woman and child in the country (AKA, anyone with a national insurance number).
To put that number into context, HMG think £12k is a livable wage (personal allowance before they start taxing you). From personal experience, my wife and I both earn around that, and we're... okay, no real luxuries, but not particularly close to poverty. We certainly have more than we would ever expect UBI to cover. We live in Gloucestershire, so hardly London prices, but hardly Northumbrian or Highlands either.
I'd suggest that an average around £10-11k as a UBI would be enough to cover the absolute necessities (we spent years earning significantly less than that which was genuinely concerning, but enough to survive).
Okay, so it's more complicated than that; whilst kids are expensive, they don't cost the same in upkeep as an adult, different parts of the country would have different housing costs - though I'd consider the extent of that to be a bad thing etc etc. There would be some fraud, but it'd be tough to pull off, birth certificate and national insurance number needed to qualify, ended at point of death... the only viable way is to bury a body in your back yard, and that typically doesn't end well for anyone. These are all points for discussion - is UBI still universal if it's region dependent? Do we spend enough on it to allow a minimal quality of life in the highlands, and barely enough to buy food in London; or a minimal quality of life in London, and upper-middle-class in the Highlands? Do we go somewhere in between, with differences but not enough, and an attempt to even out inequality over time, using UBI as part of market forces? Do we give people more if they chose to live solo rather than flat-share or with partner?
It would need some administration - probably something like:
1 full-time nutritionist to decide on food requirements - preferably with access to online supermarkets to decide on actual costs.
1 full-time peon with access to USwitch to decide on utilities allowance (we already track how many units of gas and electricity the average household uses).
Depending on how it's set up, 1 part-time contract with the ONS to decide on housing allowance (again, cost of housing is already tracked nationally and regionally).
Obviously, this is a gross over-simplification, but we're not talking 80,000 civil servants.
I would love it if furlough and SEISS reimagined itself as UBI