Of course it is a forced payment.
You don't have a choice. You either pay taxes or go to prison for failure to do so (unless you are an Obama cabinet selectee)
The best you can do, is mitigate the amount you are forced to pay via goverment approved deductions.
But your income tax payments are NOT voluntary.
Are you normal or do you have some kind of staff in white coats that follow you around??
Of course PAYING taxes is forced, what is not forced - and by the way what we were talking about - is how you recover or don't recover any tax payments that are over your normal "fair share." Again I choose to pay in just that little bit extra that you call a: "interest free loan," and I call a "little bonus." If it makes you feel better I'll call it a self-paid bonus in the future.
My point is simply that just because some people get some back does not necessarily make them misinformed, stupid, or crazy.
Again you can do as you please, and so can I.