Political Memes

"First of all, everyone does not get an X% increase in their purchasing power". Yes they do, that is the definition of a UBI. Currently, everyone has different levels of income. if you give everyone an equal amount of additional income, you have by definition increased everyone's purchasing power by X%.

"rich peoples money loses a lot more value than poor people's does simply because they have more of it". I don't understand what you are trying to say here.

"Are you seriously suggesting that taking money from group A and giving it to group B won’t make the group B more wealthy and group A less wealthy?" No? I haven't suggested that at all? You've jumped a lot of hoops to get from what I've said to this conclusion. Firstly, who said UBI must be funded through taxation? Secondly, presuming the model you have described (not UBI, but wealth distribution via taxation), it's important to define what your measure of 'wealth' in this scenario. Of course if you take money from group A, and give it to group B, group A has less and group B has more. But that's only half the equation. If the cost of everything jumps because the market corrects itself relative to purchasing power of consumers, the 'value' of that so-called 'wealth' at the end of the day may not have changed. The question at hand is whether UBI will reduce cost of living pressures, and the relative cost of goods and services is a part of that equation which you need to factor in when evaluating outcome.

"A business can't just increase its prices without the risk of driving away customers". Correct. See my previous comment on all the ways this isn't true in practice when considering market dominant forces like monopolies and similar. Economics is complicated. UBI is not the solution you think it is. You may be confusing it with Wealth Distribution, which is what taxation seeks to address (among other things)