Basic income allows people to better choose their own destiny. I can move from London to Wales, or move from Wales to London, knowing in both cases that I'll at least have a basic income to cover moving costs and minimum expenses while I set myself up.
That nets me a different quality of life in each place, exactly as it should. Choosing to live in London means you share the resources with a much higher population density and take the (many) positive and negative consequences of that.
You still need to work, but you have more freedom to negotiate; at least, you have gained a decent Best Alternative to Negotiated Agreement (BATNA) - if things go horribly wrong you can still move to Wales :)
I'm with Ronald here - I think that's very much in the spirit of basic income. Everyone has some resources available to them, and it's up to them how they spend it, but it's up to the market how much various things cost (including things like living in London).
