Support question - Tax evation

[boston_dream]

When people evade income taxes by not declaring taxable income, a vicious cycle results. Tax evasion forces lawmakers to raise income tax rates, which causes the tax burden on nonevading taxpayers to become heavier. This, in turn, encourages even more taxpayers to evade income taxes by hiding taxable income.

The vicious cycle described above could not result unless which of the following were true?

(A) An increase in tax rates tends to function as an incentive for taxpayers to try to increase their pretax incomes.
(B) Some methods for detecting tax evaders, and thus recovering some tax revenue lost through evasion, bring in more than they cost, but their success rate varies from years to year.
(C) When lawmakers establish income tax rates in order to generate a certain level of revenue, they do not allow adequately for revenue that will be lost through evasion.
(D) No one who routinely hides some taxable income can be induced by a lowering of tax rates to stop hiding such income unless fines for evaders are raised at the same time.
(E) Taxpayers do not differ from each other with respect to the rate of taxation that will cause them to evade taxes.

Your reasoning is highly appreciated. Thanks

[Shooter]

I'll take C. I guess I did it before somewhere.

Vicious circle occurs only due to gap in the income ( the income which tax evaders dont pay).

What if tax payers establish tax rates in prior to fill this gap? Then the there will be no gap and hence vicious circle wont occur right?

This will be false if the gap is increasing every year but that is out of scope.

[cicada1981]

IMO C

If the lawmakers do allow for revenue that may be lost through evasion, then they can still get the certain amount of tax revenue even in case tax evasion occurs. So they will not have to raise income tax rate to offset for the amount lost through evasion. Therefore the vicious cycle may not result.