1. It would contribute toward inflation.
If giving every adult £200 a week would contribute to inflation, what would happen if everyone “worked hard and got on” and earned an extra £200 a week?
Would that also be eaten up in inflation?
If so “working hard and getting on” is just as pointless as giving everyone an unconditional basic income.
2. It undermines the incentive to work.
It incentivises work, because it abolishes the benefits trap. Anyone doing any form of paid work will always be better off than someone subsisting on UBI.
It also frees the entrepreneurial spirit in every citizen