Only if it added excess cash.
Average earnings are about £35000. Currently tax and NI would be about £7000, take home of £28000.
Give everyone UBI of £12000 - no need for state pension now, just UBI. The average earner would need to pay tax at a rate to give them a take home pay including UBI of £28000. So £16000 of the £35000, tax of £19000, tax rate of about 55% on all earnings.
So someone currently working part time, making £12000, would get UBI of £12000 plus earnings of 12000*0.45 = £5400, £17400 all in, probably around what they get now with benefits top up. No need for benefits now.
Someone now on £50000 would now be taking home about £38000. Under my UBI system, they're taking home £12000 UBI plus £50000*0.45 = £22500 +£12000 = £34500
Someone now on £80000 would currently be taking home £56000. Under my system, 12000+80000*.45= £48000.
Benefits might continue to target certain things, like Child Benefit to encourage us all to get jiggy. But no safety net. Work pays for everyone.
Might need to lower my UBI slightly to get income tax under 50% for the psychological aspect, might be able to lower tax because we're no longer funding universal credit. But a much fairer system I think.