Well truth be told ancient Greece was rich and poor. They had more poor people than rich. So it is partly a rich country but the percentage of poor is greater. The poor had to get two jobs to make a living but they still didnt get half the money the rich had.
Poor people need clothes because everyone needs clothes. Just because they are poor doesn't mean they don't need clothes. Unfortuneately, poor people cannot always afford clothing. This is why there are places like the Salvation Army, or Goodwill that sell clothes for not very much money.