Price doesn't matter. It's just a number. This is about distribution. Inflation reduces the value of those who already have cash. That is the point of UBI. It

Price doesn't matter. It's just a number. This is about distribution. Inflation reduces the value of those who already have cash. That is the point of UBI. It says that everyone should have enough to live on. The wealth has to come from somewhere. Inflation takes it from those who have a lot. The actual numbers adjust to match. The OP's question was whether it would affect supply. And it will, but not as much as they think. Most people will continue to work anyway. But their relative salaries will be different.