For reading, digital. I can have access to a functionally unlimited number of books. They also tend to be less expensive. That makes a difference for media like manga where it racks up pretty quickly. And I can make adjustments to the text and lighting that help with readability.
I still like having some books around as decoration. They bring a room together nicely.
That's going to have to be part of it, but it can't be all of it. There isn't enough money in the upper class to take care of all of the debt, and at a certain level of taxation they will just move. I will speak in favor of increasing taxes on around pretty much every individual making over 100k or couple making over 200k. For a single person working 40 hours a week in the US, that is the 77th percentile. My husband and I are in this position and I think starting the additional tax burden with us would be fair.
I don't see raising taxes much below us as being very productive, and those "flat tax" people can fuck right off. That group is already paying money into entitlements so the oft repeated statement that half of households pay no income tax is misleading. They're really struggling right now, so I just don't see an increase in taxes as productive.