The main benefactors would be the unemployed "dole dossers". An extra £50 quid a week for nothing & not affecting their benefits.
If you believe the current stats (I do not, I believe they're lies and unemployment is far higher) and excluding the extra cash the employed would be better off, the government would need to find an extra 6.6 billion per year for this.
We've just had 10 years of austerity to reduce national deficit which is just back to pre-financial crisis levels & this thinktank (seems the lights are on but no-one is home) wants to add 6.6billion at least each year too it, making the last 10 years for nothing.
You looking at too simplistically.
You think if you giving everyone £48 a week its money going into a blackhole.
In reality its money spent in the economy, so everyone is better off for it.
You give a poor man £10 he will almost certainly spend it somewhere. You give a millionaire £10 it will sit in his bank account offshore somewhere.
Also I am not sure if the proposal is to exclude it from money needed to live on calculations. So for those on benefits if its not excluded, it would act as a safety net if e.g. sanctioned but would not really topup benefits if they claiming means tested benefits as things like housing benefit would be reduced for it. It would only be extra for those on benefits if the benefits are not means tested such as NI based (work history), if I am right it basically means those out of work, but have NI based benefits would get more income than those who dont have a work history.
So e.g.
£72 a week JSA contribution based not means tested than add the £48 allowance would get £120 a week.
£72 a week JSA income based means tested would get £24 a week plus the allowance as it would be deducted for excess income. Total income £72 a week.
Also there are people too ill to claim JSA but not ill enough to claim ESA and currently get no financial support, this would be a relief for them, so this is a good thing for sure.