You miss my point.  Yes, voters can restrict new taxes and tax increases.  They can even vote to cut taxes.  My point is that if they choose this path, DON'T approve new programs that require additional revenue without a means to cover the costs.  It only makes the problem more difficult to solve.  
I personally think that public schools are not held to account for their spending.  Many school districts already spent the money from the "Grand Bargain" the legislature passed...  and then the Oregon Supreme Court struck it down.  Now they are pleading they don't have enough money.  Spend money you don't really have and it becomes problematic.  Voting for and approving programs you don't fund is also a big problem.