they can get bitcoin in paper form like what you get when using Bitcoin ATM.
pieces of paper with public and private address after that they can import the private key to any wallet "just show the private key to any scanner" and get the money.
Important point
you must have some knowledge and internet access to use bitcoin.
Actually sir beggar is no longer access to Bitcoin because this is not like a fiat money that current uses today, every moves for bitcoin are use for new technology gadget like cellphone and computer, how did they access that? Even a small problem like daily food to eat but its difficult to get how much more bitcoin. That's only my perception sir