No. Tax rates will always be a simple way to determine your starting tax liability. Tax complexity is the reason that most Americans are so frustrated with tax season every year. If the federal government could simply the complexity of tax credits, changing tax law, and tax itemization, Americans could better plan for tax season.
It is the rate of taxation that's the problem. The problem is there the tax code is riddled with so many loopholes that most wealthy people can find ways to avoid paying their taxes altogether. Meanwhile, people in the middle class do not enjoy those benefits and are funding much of the government.