That's an interesting idea. Would be interesting to see how it works out. I think this may work well if the threshold for basic income is chosen carefully (I don't know if 800 euros is the right number). It should be enough to provide for the very basic necessities, but not enough to make it worthwhile to choose to be unemployed if job opportunities exist.
Given a subset of the welfare people are poor with budgeting and planning - I don't see how this will work. If they blow their money on gambling, drugs, or debt then they will still need assistance with housing, food, and clothing. In the end, they will get both the monthly stipend plus the same support they get now (otherwise why would all the government welfare administrators be OK with this).
The article hints at this:
while still offering some additional benefits such as housing support.
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