Republicans who control state government successfully pushed to permanently reduce the state's top income tax rate, slash the oil and gas production tax rate from 7 percent to 2 percent and give more tax incentives to industry.
But the boom ended and the money dried up. Now unwavering confidence in the wisdom of lower taxes has given way to a growing panic over how to pay for basic services such as schools, health care and public safety. Revenue has fallen about 20 percent short of budgeted needs for the third year in a row.
The situation has deteriorated to the point where highway patrol troopers have been warned not to fill their fuel tanks, and drunken drivers have been able to keep their licenses because there are not enough administrative workers to revoke their driving privileges. Nearly 100 of the state's 513 school districts have moved to four-day weeks.
Oklahoma's woes are intensifying just as President Donald Trump's administration proposes its own ambitious plan to slash corporate and personal taxes. The White House insists the overhaul will spur economic growth and bring prosperity to the middle class, but the idea alarms lawmakers worried about the risk of ballooning federal deficits.