One problem with this is, at some point people may realize loaning money to the government is a bad deal and stop doing it.
People (actually, institutions) keep buying government bonds because they're typically very low-risk. So you're losing actual wealth, yes, (a small bit), but it's the safest form of carrying wealth into the future at all. Like, you could buy gas for your car for $1000 in 2026 instead, but then you risk the price of gas dropping and losing value that way too. Government bonds have a small predictable negative profit, but are virtually risk-free, which makes them attractive nevertheless.