What is Rohrbach's MAIN argument against Proposition B?

This question is incomplete. Here's the complete question.  

Read "Proposition B is flawed," by Larry Rohrbach.

What is Rohrbach's MAIN argument against Proposition B?  

Proposition B doesn't raise enough money to repair the roads.

The roads are in good condition and don't need to be repaired.

Most Missourians are too poor to pay for the tax increase.

The money raised by Proposition B will unlikely go to improving the roads.

The money raised by Proposition B will unlikely go to improving the roads.

Explanation:

Rohrbach is against the government´s proposition to increase taxes to improve Missouri's roads because it has been done without the expected results.

He claims that the problem to address is the Missouri Department of Transportation´s accountability, because, instead of completing the promised road improvements, they've wasted the money.

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