"50% of the population doesn't pay federal income taxes. How is this not a tax break?"
The last time I paid no income taxes, it was because I made so very little money. My understanding is that because I make so little it is understood that it is better for me to keep that money than to shuffle it around in government assistance.
Now, with a 50%, that would imply that half the population lives on a small amount of money, and thus be an argument that something is not at all balanced.
Or, if you think the 50% makes perfectly good amounts of money thus they could afford taxes, and the people making small amounts are paying too much taxes, then again, I think you are only bolstering the arguments of those you are arguing against.
Your other comments don't seem logical to me either (people start businesses in european countries all the time, cell phones can be cheap on a prepaid plan, it is arguable that you do need a phone to live in today's society, etc). Saying 30% of people do not have health care is shocking to anyone who thinks health care fundamental for life (you take care of your car, but not your body?).
Of course I have made a lot of assumptions in what I've written, but without understanding your assumptions and what you are trying to say, I could only use this as arguments to why I should support the protestors.