The whole point of basic income is to reduce the friction for obtaining necessities ... which is increasing demand for a limited supply. Demand increases, supply either exhausts rapidly or finds some other way of increasing friction - usually by increasing prices, stabilizing right about back where we started but with higher prices.

In addition, money itself is of limited supply. Reducing the friction for obtaining money results in increased demand for that limited supply of money. Demand increases, supply either exhausts rapidly[1] or finds some other way of increasing friction - usually by increasing prices (inflation), stabilizing right about back where we started but with higher prices.

[1] - "The problem with socialism is eventually you run out of other people's money."