> It's Finance 101 that if you manage to borrow below inflation rate

And when was the last time that happened? Pretty much only during inflation spikes. The vast majority of time, inflation is around 2% or maybe 3 or 4 recently, 10 year Treasury yields is well above 4.5%.

So maybe you have 40T USD lying around, and you're willing to lend it all to uncle Sam for inflation -.1%. if that's not the case then it's finance 101, and wishful thinking