so would your opinion be different if it turned out the repayment was 1/10th as much?
great deal, right.
you have agreed that the value of the principle is reduced considerably over a century. so we aren't repaying something that is a great burden to this generation.
and perhaps you are also aware that retirement of debt at 3.5% is a great idea when you can replace it by issuing fresh debt at 3% if you wish.
and let's say you can use the new debt at 3% to build a power station that yields 6%, say. that would be sensible even in your book, wouldn't it?