Well done for having the presence of mind and clarity of thought to question dogma; when facts change you should indeed change your mind. And those points you raise are not the only questions conventional economics has struggled to adequately explain. May I suggest you read up on MMT, as many of your thoughts are aligned to its framework. I would further recommend you read serious work on it, not just journalists who mostly simply don’t understand it. If nothing else it will provide insight as to why fiscal austerity doesn’t work in situations like post-GFC Europe.