Most news outlets also stand to benefit significantly because it is primarily a tax cut for businesses.
Put "typical family" into the Breitbart search box.
The first match is for http://www.breitbart.com/economics/2017/09/30/mainstream-med... . In it, "Gary Cohn, the White House’s chief economic adviser and its lead advocate for the GOP tax overhaul" talked about the effect of the then-tax plan on "a typical family earning $100,000 with two children that has been a standard deducter, has used the standard deduction and continues to use the standard deduction".
(You'll notice that Cohn used $100,000 of income, which is the same income that Texas Sen. John Cornyn was quoted as tweeting.)
Other media sources misinterpreted that as saying that the typical family earns $100,000, when "the average American family makes $74,000 a year".
Breitbart's article complained about "the difficulty of persuading a skeptical mainstream media that the proposal would cut taxes for the middle class."
I found no article describing how the tax cut would benefit the typical family.