First I think you have to understand what money is. It's not the paper that makes it worth something. It's that we as a society have agreed to place a certain value on it but that value can easily change.
Before there was paper money there were gold/silver/copper coins etc. But then, why is gold worth more than silver? You can't eat gold, it won't keep you warm. Humans have placed value on it due to it's scarcity and the fact that it stays shiny.
Without paper notes or coins humans use a barter system. I'll give you a goat if you give me 5 barrels of potatoes.
Imagine you are a potato farmer. You have hundreds of barrels of potatoes, more than you could ever need. If someone offers to give you more potatoes in return for a goat, you'd say no because you really don't need more potatoes, they'd be worthless to you.
Imagine you are a goat farmer and you have thousands of goats but no potatoes. If someone makes you the same offer to give you potatoes in return for a goat, you'd say yes because you'd like some potatoes for a change and you've got so many goats that one single one is not worth much to you.
Going back to modern money, if everyone had a billion pounds in paper money but didn't have any food, what would happen? A person would be willing to pay 1 million pounds for a loaf of bread because they're really hungry and their billions in bank notes aren't worth much to them. That's basically what happens when inflation is out of control.
So during the Weimar Republic, a loaf of bread in Berlin that cost around 160 marks at the end of 1922 cost 200 billion marks by late 1923. People were literally loading armfuls of paper money into wheelbarrows just to go buy bread.
So that's why printing money and handing it out isn't a simple fix.