This means the young adult won't ever go to work because nearly everything he would ever make would be deducted to pay off the fines he can never finish up. Thus he will simply not pay the fine, become unemployed, and make the country pay him social security to live. Any work he will actually do will be gray, i.e. unofficial untaxed "pirate" income that doesn't formally exist. Way to go.
The TPB guys probably have more ambitious plans as the liberation front of bit-sharing. I bet this might just tip an even larger percentage of Swedish people to support TPB and the Pirate Party. Isn't the only thing that is, in the crowds of conservative government or business, more dangerous than a liberty fighter an imprisoned liberty fighter?