Well, we do and we don't. On capitalism some people must sell their labor to get any compensation, which means that radical advances in technology or efficiency can be catastrophic. So on that system, yeah you need jobs and ever expanding consumption. But is this what humanity needs? We're struggling to sustain the level of employment needed for everyone to have a half way decent life as you can see in the image below which shows the labor participation rate from 1980 to today.
Some commentary from Buckminster Fuller: