It's not cushy laws in the UK, it's the support network that exists for people arriving with nothing to their name. A refugee, once he's on British soil, will disappear into a huge community of his own nationals willing to give him lodgings, food and even a job for pocket money. That's how they are, it's the culture of hospitality and support that exists in those countries.
If he keeps his nose clean and stays away from the Immigration authorities that refugee can live here indefinitely and even start sending cash home via the hawala system, where he hands the cash to a hawala man in his town, who then calls his oppo in the home town and tells him to give the equivalent to the refugee's family. It's informal, cheap, reliable and completely legal so massive amounts of money are moved around the world in this way with no need for bank accounts.
There are huge communities in the UK of people, legal and illegal, from every country in the world so once a refugee is on British soil he's home and dry with no need for social services at all. He will be safe from religious or political persecution, sheltered, supported, paid a prodigious amount (by his standards) of untaxed cash for kitchen porter or car-washing work, support his family and eventually even buy a car, which is a fantastic prospect for a young man from a desperate, dangerous country in Africa, Asia or the Middle East.