"OK, I'll bite and give you first rope..."
HA! I'm already swinging by my neck...
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"Is it just the simplicity of the idea?"
Well, it 'is' simple, isn't it?
A point of purchase tax (replacing ALL other taxes) on EVERY transaction, for EVERYONE, with NO exceptions, exemptions, loopholes.
Certainly: way more simple than what we have now, on any level.
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"Is it because it is regressive?"
The regressiveness is irrelevant to me. Consider: you have a fifty in your wallet and I have a twenty in mine...right there we -- you and me -- are not equal. As you like, from the start, you can purchase more than me, do more with your cash.
Should I cry and say, 'hey, we exist in inequity: gimme some of that cash, Lamp!'
If I've performed no service for you, offered no product, and if you're not the charitable sort, then my laying claim to part of your fifty is not a cry for equity, but simple extortion (*theft).
Life (living) is regressive...*shrug*
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"Do you think all types of transactions should be taxed at the same rate?"
I suppose there's some room for wibbling around on the point of purchase tax rates...I'm not married to any particular number. Mostly, though, farting around with varying rates for 'differing' points of purchase is just a transparent attempt to tax certain folks more because those folks 'have more'.
Concretely: if the point of purchase tax rate is, say, 10% for a loaf of bread, then the point of purchase tax rate should be 10% for a private jet or a yacht.
Again: to me, where the money comes from is irrelevant, how it's spent is irrelevant, only the spending (the transaction) itself should matter**.
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"Do you see any situations where some taxation should be progressive?"
No really, no.
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"Oh yes, be prepared to defend your answers."
HA! I tried, failed, and await execution...
*Which is fine...I got no problem with theft...just be upfront about it...don't dress it up in ethics or morality...if stealing is what's to happen, then just fucking 'do it'.