Most of those jazzy overtones come courtesy of Mr. Skunk Baxter, whose breezy octaves might be something close to a first for what is technically a rock song. But even this early on, Steely Dan were already cross-genre dressing their songs in a carefully crafted way. Unusually airy and cheery as far as the melody goes, that didn't compel Becker and Fagen to make this into some love song or some other uplifting topic like any other songwriter would do. Oh no, this is about putting down some delusional young dude for talking about a world where all is free." That's actually the perfect kind of topic for 1972, when the hippie generation's hopes and dreams came crashing down to reality in that post 60's hangover called The Early 70s.
Later on, Becker and Fagen would go on to write many cynically viewed tales of deviancy, debauchery and other failings of the human race. But it's here where they set forth their credo that drives the plots for those songs:
Anybody on the street
Has murder in his eyes
You feel no pain
And you're younger
Than you realize
We may all agree with this sentiment, but at least back then, only Becker and Fagen would (come out and) say that.