The United States Catholic Bishops highlighted several key themes at the heart of Catholic social tradition in their document Sharing Catholic Social Teaching: Challenges and Directions. They had the following to say on the dignity of work and the rights of workers.
"In a marketplace where too often the quarterly bottom line takes precedence over the rights of workers, we believe that the economy must serve people, not the other way around. Work is more than a way to make a living; it is a form of continuing participation in God's creation. If the dignity of work is to be protected, then the basic rights of workers must be respected—the right to productive work, to decent and fair wages, to organize and join unions, to private property, and to economic initiative. Respecting these rights promotes an economy that protects human life, defends human rights, and advances the well-being of all."
Quoted from: Sharing Catholic Social Teaching: Challenges and Directions Reflections of the U.S. Catholic Bishops. The document is available here.