Conversation so far:
When did Robert Owen return to Britain?
In 1828, Robert Owen returned to the United Kingdom and settled in London, where he continued to be an advocate for the working class.
Where was Robert Owen living before returning to London in 1828?
Robert Owen and his son, William, sailed to America in October 1824 to establish an experimental community in Indiana
What happened to Robert Owen in 1832
In 1832, Robert Owen opened the National Equitable Labour Exchange system

Question: what did the exchange system do
Self-contained rewrite: What did the National Equitable Labour Exchange proposed by Robert Owen in 1832 do?