Be that as it may, it doesn't have to be inflationary - as long as the government isn't competing for *real* resources - commodities, people, etc, then inflation doesn't have to follow.
You can't follow a statement like the above with this:
Again, MMTers know this because they follow how money works in real-life, not just a theory on how it should work in a perfect world.
You're basically trying to say that in theory, in a perfect world, the government can print money to spend without inflation. Just so long as it doesn't compete with everyone else in the rest of the economy.
But unless it's paying unicorns to do the stuff it wants, of course it's competing with the rest of the economy. If you print money to build a road, then you're going to be employing people who would otherwise be doing other stuff - using their mechanical diggers (that now won't be digging holes for other clients), and concrete/aggregate/fuel that other people now won't be using.
The same if you employ more nurses, someone else now won't be paying those people to do stuff.
Now you can get away with this in Greece for example. Where they have deflation and mass unemployment and under-utilisation of resources. Printing money in Greece is exactly what the Eurozone should have done, but they deliberately decided to exclude Greece from Quantitive Easing - due to being incompetent fuckwits.
In the UK, with much lower unemployment, and wages already slowly rising, printing money to spend would be inflationary.
Secondly you have to remember that economics interacts with politics and public expectations. If enough people believe there's going to be a recession, then there will be. Banking crises are all about confidence. People's belief in what future inflation will be, drives their current actions, and can cause that future inflation. So if you allow the feeling to develop that you're going to lose all monetary discipline, you'll get more inflation than a government that is believed to be prudent doing the same thing.
As an example, I don't believe that QE will in fact be unwound. The Central Banks will use it as a tool to dampen money supply growth without having to raise interest rates so much. So they'll sell some bonds back to the markets. But at some point, I believe a Chancellor will stand up at the budget and quietly just write-off a chunk of the government debt held by the BofE. Because it's a one-off, we'll get away with it with just some minor harrumphing from The Telegraph and the FT. I think that'll have no effect on inflation, and be seen as a one-off. Although it's important not to do it until we're sure we won't need QE again for a nother few generations. As it would make QE (and us) much less credible if say we did that now, then China and the Eurozone economies both collapsed, and we needed to resort to it again.