fugitive slave act
i have been to china and have been to the great wall and etc. so i am a expert so ya
an escape from a place indeed requires money as it consists travelling. and also, making an escape is not easy. there are many officials who keep an eye on everything so it is a risk. other than that, usually someone who has to escape, takes someone's who in turn asks for a price. which, in this case, the jews had no wealth with them.