Thanks for the elaborate response. To me the 'taxes don't pay for public infrastructure' seems bizarre. Are you saying public infrastructure shouldn't have to be payed for by taxpayers, or that it isn't payed for by taxpayers? I can understand you making a point about the first given your MMT explanation, but taxpayer money IS actually being used for all sorts of public infrastructure, isn't it? A government could use money creation for every project, but they don't, they also collect taxes....
I would also worry that the risks of (hyper)inflation are being downplayed in this theory. But too be fair I'm not an economist, nor do I have knowledge about MMT, so I'm really not the person to refute any of this. It's interesting and I'll look in to it with an open mind. Thanks