Taxes are a necessary part of a democracy, as long as they pay for services the citizens approve of. When people rant resources such as public schooling, libraries, and welfare, they must in turn contribute to these programs. It only makes sense to help may for something if you're going to use it.
What in the constitution says anything about us not being taxed? And why would we want to stop being taxed? As much as I feel that a lot of my tax money doesn't go where I'd like it to, I'm glad it's going to certain essential things. Where would we be without funding for roads or power? Where would our children play without government maintained parks? Who would protect us without an actively paid police force? Who would put out our fires, or deliver our mail? We need taxes to continue having a functioning society. Period.
Taxes in general are constitutional at least. I guess it could be argued that certain taxes are unconstitutional, which I am sure many of them are. But, in general, I do not think that there is anything in the constitution that prevents the government from simply taxing its citizens. The country needs taxes to function.
Even the income tax, though an amendment had to be added. Progressivity is more of an opinion, but so far the Supreme Court hasnt said nay yet (mostly because nay is for horses, I believe they would say "no"). I just hate having to file at end of year. Get rid of tax returns and deductions, for no other reason than I just really don't like paperwork.
Yes, taxes are constitutional. Taxation is legally allowed in the US government. Now, you can debate whether or not taxes are morally justifiable, or whether or not taxes are useful. Those questions may be harder to answer. But to figure out whether or not something is constitutional, you need only to look it up.
It is actually in the Constitution but that doesn't mean it doesn't violate our right to keep what we earn or our right to our property. Taxes are a bad thing people! Who cares if it pays for programs--most of which can be privatized, it is wrong to be stealing from others without their consent. Even though taxation has representation by a majority vote, that doesn't mean it has the consent by everyone, so there is a rights violation here. We want to minimize this violation by voting for less taxes!
The government has no right to dictate what I do with the money I earned. Imports can be taxed, as well as corporatons. Individuals and mom&pops should be left alone. This is why I moved to China. I earn more money, and there are no personal income taxes here. Corporations are taxed at a flat 6%. It's simpler, easier, and nobody has to lie or cheat their way out of taxes.