Keridan, whether you purchase a TV or make a donation to UNICEF...you instinctively understand that the money you spent cannot be used for the other goods that you value. This is known as "opportunity cost". When people are considering how much defense they would be willing to forgo for healthcare they are considering opportunity costs. The opportunity cost concept is necessary to ensure the efficient allocation of scarce resources.
I mentioned this to you way back when you brought up your Medicare example...
"The only way to ensure the most efficient allocation of public goods is to force taxpayers to consider the opportunity costs of their tax allocation decisions. You obviously value your grand/parent's health...so what other public goods would you be willing to forgo in order to help fund their healthcare?"
I'm not being obtuse...you're just bringing up the same thing that I already answered with basic economic concepts. You obviously didn't grasp it the first time even though I provided you with a link to help explain it. Like I said...This "doesn't bode well for our ability to make much progress with this discussion. If you trust your conclusions so strongly that you fail to consider the evidence that I offer then...well...we might be here a while."
Economics is all about opportunity costs. Read the
opportunity costs of war and the
opportunity cost of public goods. Read Bastiat's essay on
opportunity costs read Hayek's essay on
partial information. If you don't read and understand what I link you to then you're going to keep on bringing up the same objections.
I can't provide any evidence on how the wealthy or the poor are going to allocate their taxes. But I know you can't generalize people's values based on how much money they have. That's ridiculous. I just know that there is plenty of economic evidence for how resources are efficiently allocated and there is no economic evidence for planners being able to efficiently allocate resources. It won't work out wonderfully but it would defy everything we know about economics if it didn't work out better than the current system.