Should we extend EITC to childless workers?

Jason Furmans says yes, here is one bit:

Looking back at the history of poverty and the tax code in the last several decades reveals some important lessons for expanding opportunity and combating poverty going forward, including the value of having a pro-work, pro-family tax code. The most important new prospect in this area is expanding such an approach for households without children, a proposal that President Obama included in his 2015 budget, and an idea that is also being advanced across the political spectrum, from Senator Marco Rubio to Bush Administration economist Glenn Hubbard to Isabel Sawhill at the Brookings Institution.

It becomes more analytical after that.  Here are some further basic facts about EITC extension.  Here is a 2009 study (pdf).