You're not taking the math out far enough. Look at how specific numbers play out.

Let's say ZOG is scheduled to print $1 trillion next year, but then I add $20,000 to it with my student loan. So now they'll print $1 trillion and $20k instead. Does that change the value, in terms of spending power, that is getting siphoned away from bondholders? (who, by the way, are choosing to invest in this thing that I'm printing for free, against my advice). It doesn't. The total fair market value of the total money supply stayed the same, it's just that each individual unit is worth less. So I'm only changing the allocation of the heist. The paper fell out of the bank robbers car. Would you rather I pick some of it up, or let the gang who are even worse people than me keep it all for themselves?