The problem is that basic income is not enough. Most of the people who will receive it will still need and want more. This means they will still be looking for

The problem is that basic income is not enough. Most of the people who will receive it will still need and want more. This means they will still be looking for work, and will be willing to accept lower wages, because they have the basic income. This will in turn drag down wages for everyone and end up as a tax-payer subsidy for employers - effectively, part of wages will be paid by the government/tax payers through basic income.