Here is some coverage as to why Oregon's tax is not abysmally low - http://oregonecon.blogspot.com/2016/07/more-background-on-ip28-measure-97.html

"We Oregonians" have allowed our state to be run by  incompetents who waste huge amounts of money then parachute out to comfortable PERS retirement. Many bills that support things we all believe in then get voted down because the ounce of common sense Oregonians have tells them not to throw more money down the toilet.