The problem with a 100-year US government bond

The US is running up debt like never before, and one of the reasons Washington can get away with it is because interest rates are hovering around their lowest levels ever. This raises the question—should the Treasury lock in these rates for 50 years? Government borrowing is under renewed scrutiny as politicians consider their third mega-spending package to support the US economy, adding to more than $3 trillion already earmarked since the onset of the Covid-19 pandemic.