Bone, I laughed when I saw this. Thanks for posting it. I imagine that the results of asking these same to questions of only MMT economists would be exactly the same! They would strongly disagree.
These questions are, I think, coming from old-school economists' perception of MMT.
I have been studying MMT for about five years, and I still have lots to learn, but it's far more nuanced and complex than these questions suggest.
It's really nothing more than a formal recognition of realty. Abba Lerner, well-known in the 1940s, wrote stuff that folks read and said, "huh," and really did not understand, or at least it failed to sink in. Then at some point people started to take a closer look at the Treasury and Central Bank books. Laid them down on a table side by side, figuratively of course, and said, "Oh, my God!," old Abba was right!
Naturally, there are constraints, and a big one is productivity. You can't have much more "effective money" running around in an economy than can be justified by productivity or you'll have horrible inflation! ('effective money' takes velocity into account.) Also if you want to issue bonds you'll need buyers, other than your own central bank. These are but a few of the constraints. And then there is the non-discretionary bond servicing. That's another, etc.
It's complex, and its nuanced, so the misunderstanding; the misperceptions, are bound to continue. The Congress and our Central bank have been applying some principles of MMT for some time now, they just don't realize it, and would be embarrassed to admit it. (It's not popular among "old-school," Samuelson-trained economists, with a few big exceptions.) We are not doing a very good job of applying MMT anyway. I hope we will get much better at it. And there are social aspects that have yet to be explored, but we can't avoid them. They will bite us in the ass unless we pay attention.