From a simple supply and demand standpoint, how does the extra income introduced not simply cause the cost of basic* goods to rise accordingly such that you end up with your UBI increasingly falling behind what is needed to support a minimum standard of living?

* Added "basic" for clarity, I don't imagine this would affect the cost of luxury, or recreational goods to a large extent, but an extra $1000+/month per person would, I expect, have a drastic effect on housing rental rates amidst the lower to middle class residential areas