Unconstitutional really isn't a concern for believers when you think about it. We know already the whole world lies in wickedness, right? So we expect it to do evil things, unconstitutional things. It's the world!
And what is the root of all evil? The love of money.
So it's the love of money that drives the unbelieving world, so they look for all kinds of ways to make more money. It's what drives them, and they will do whatever it takes to get more money.
As for the Constitution and personal income taxes, some have won in court against the IRS, but there are few of them. One of them is a former tax enforcer named Bannister. Look him up. He's gotten under the skin of the IRS more than once.
Joe Bannister's site...
http://freedomabovefortune.com/From what I understand, and there is several at PPF that are much better versed on this, but they generally say it's an issue with taxing a person's physical effort that can't be done. I forget the legal aspect. And they also say that the income tax was temporary, and was never made official. And they also claim the 16th Amendment wasn't ratified properly or something.
As a CPA, it might serve you well to get educated on the whole income tax issue. Read up on the cases that won, and lost. What you'll see is the cases that were lost, how they lost. Most of them argued the wrong argument in court, thus they lost. Add to that the feds always game the courts, and the judges have a habit of not allowing evidence in cases, effectively handcuffing the defendents.
Here's another person who beat the IRS, a very interesting case to see how the feds tried to game the court case.
Tom Cryer
http://en.wikipedia.org/wiki/Tom_CryerOne must really pay attention though to what each case is alleging. Some lose because tehy were technically guilty of something that is indirectly related to taxes. Not all cases are what they appear to be in reality. Many times the case isn't about not paying their taxes, but not reporting income, thus not paying tax on that income.
Both the Bannister and Cryer cases are good examples of cases that get right to the question of the legality of income taxes. From what I remember, both times the IRS was requested to prove their assertions that income tax was not voluntary or something. They never did produce the evidence, so they lost the cases I think.
There was a case also of a man who was paying his employees with gold coins, Texas I think, and thus not taxing it. He ended up winning his case somehow too.
All of these wins the mainstream doesn't like discussing, and the feds surely don't, so they aren't right out in the open for people to run across. You kind of got to know already what your looking for.
So yea, pay attention to what the IRS is actually charging a person with. An IRS win isn't always what it seems too, but of course the feds always crow about a win regardless.