Is it even hard? JFDI, or as we might say here, shut up and do the impossible. Is "efficient" a tendentious word? Taboo it. Is discussion being confused by mixing normative and positive concepts? DDTT.
The quote smells like rationalising to me.
Yglesias seems to be committing an error here by confusing technical jargon with common English. Efficient has a very specific meaning in economics (well, two specific meanings, depending on what kind market you're talking about). The word efficient is not meant to refer to universal goodness and it's a mistake to treat it as if it were.
Here's the new thread for posting quotes, with the usual rules: