I looked it up. I struggle to live not as well as a Norwegian prisoner.

A good example is to see what Varg Vikernes were doing while in prison:

Burzum remained as a solo project until 1994, when Vikernes was arrested for the murder of Euronymous and the burnings of several churches in Norway. [...] While imprisoned, Vikernes managed to record two other albums in a dark ambient style. They were released as Dauði Baldrs (1997) and Hliðskjálf (1999). Both of these albums were created with a synthesizer, as Vikernes was prohibited from using any other instruments in prison.

https://en.wikipedia.org/wiki/Burzum#Imprisonment_(1993%E2%80%932009)