Some quick calculations....
21% of the population are under 16.
So out of 100 people 79 are over 16 and would get the universal benefit.
15% of people are over 65, so out of 100 that's 15 and that leaves 64 people out of 100 as being of working age.
Out of those 64 1 in 5 are economically inactive, let's call that 13.
So 51 people out of 100 are of working age and actually working, and they have to pay the tax to fund the Universal Benefit for 79 people. Each tax payer funds 1.5 people, including themselves.
So for the Universal Benefit alone they're going to have to pay £15k in tax.
It's been proposed that tax is 50% and starts at £20k. So for someone to pay £15k in tax they would need to have a taxable income of £30k. So a total salary of £50k.
The average salary in the UK is £25k.
Even if you introduced the tax at 50% from £10k people would still need a salary of £40k to make this work so still far above the average.
Do you see now why it just wouldn't work?
And yes the Government does have other sources of income beyond personal taxation. But spending on benefits is about 50% of the spending while tax and NI is about 50% of the income. So it is pretty safe to say that taxation and benefits should be about equal.
Under this proposed system there's an absolutely massive shortfall. And I haven't even factored into the equation the cost of making the system run.
I really do fail to see how this would work....