The more money you have the more money you spend the less wisely you spend the more the price goes up to much making the whole country poorer.
You can however approach the problem differently. What products and services do you want to expand for the citizens that you are willing to put the same extra money into.
Locking this extra money to assist benefits claimants and workers this way can be a far less inflationary and lead to wealthier better serviced citizens although it is not a magic wand there will still be inflationary and supply and demand issues to deal with over the years.
A citizens income sounds such a good idea ideologically but how psychology effects prices is what it is and the risk is there.