You get rich refugees. In fact probably a higher level of refugees in the rich population than the poor as the rich can afford to travel and (sadly for the poor) fewer places will turn them away. War is not unique to undeveloped parts of the world and money does not protect you but instead might make you a target.
The quality is hard to judge their wealth by as you don't know how much those clothes and cases would cost, cheap modern clothing would be exceptionally fine one thousand years ago.
Also an astromech droid is a utility device which a poor family might own for their work. Using a droid not designed for serving food to serve food would probably be a sign of a lack of wealth, like a farmer who uses his tractor as his car.
TLDR: it's hard to assess the wealth from an economy that we have almost no knowledge of.