Why would you be shocked? There's all sorts of nasty things in these tax proposals for the less than wealthy. They are looking everywhere they can to find offsets to make the tax cuts for the donor class work under the budget rules.
The majority of HN readers are going to see a net increase in taxation, to fund giveaways to the GOP's donor class.
The bill gets rid of AMT, which many HN readers have been hit by, thus helping them. It also increases the standard deduction, which helps lower income people much more than higher income people.
I don't like the plan because I pay more under it, but the value of the giveaways to the very rich seem rather small compared to low income benefits. Lowering of the corporate income tax rate and axing the mortgage interest deduction has broad support from economists across the political spectrum too.
NPR had an interesting piece on this in 2012:
https://www.npr.org/sections/money/2012/07/19/157047211/six-...
Edit, great chart showing who pays more / less: https://www.marketwatch.com/story/here-are-the-winners-and-l...
Good article from Pew Research on this: http://www.pewresearch.org/fact-tank/2017/03/07/employment-v...
"As many observers have pointed out, the official unemployment definition leaves out some significant groups. The underemployed – part-time workers who would prefer to work full-time – are counted among the employed. And discouraged workers – people who’d like a job but have stopped looking because they don’t believe any work is available – aren’t counted as part of the labor force at all."