People are afraid to admit that we should be doing something different because it means those doing the old thing are unethical or wrong. This is not true because our actions have many different counterbalancing effects, harming one group but helping another. There is no 'perfect action'.
At the most basic level working fewer hours means we could share jobs, reducing unemployment. But it has many other effects...
Helps the poor:
Helps the rich:
It also fixes war, poverty, and hunger, and allows us to focus more attention on climate change.
Some concerns people might have are resource consumption and social spending. But people are more likely to agree to taxes to help, say, orphans if they are not already being taxed to support adults on welfare who are able to work.