Because dynamic systemic cost inflation is still inherent to commerce/the economy, and so merely injecting money into the economy re-initiates the cost inflation and so still cannot completely overcome it (cost inflation).

However, distributing a universal dividend directly to the individual, because it does not go into the economy first, costlessly solves that cost inflation for the individual.

And it also will require a macro-economically derived discount to retail prices as the systemic cost inflation itself will still exist and persist,  and so reducing prices where they are terminally summed, namely retail sale….is the complementary, precise and effective policy for the entire system, i.e. macro-economically to attain and maintain virtual equilibrium.