Eh, do you know people who have been living in socialist economy with guaranteed near 100 % employment rate? That is achieved by providing work that is, well, pretty much like that. Add chronic lack of electricity and you know why they "need" and need those women.
Prostitution, that´s another forte of Socialist economies. In the Soviet days the Russian women offered themselves for those stocking you see in that picture...
I know that Finns have an inherit dislike for socialism, and rightfully so considering your historical relations with Russia, but you are deceiving yourself with simplified logic here...
There are basically three ways of managing excess labour
The first one is that the state provides jobs (however inefficient) as a means of aiding the unemployed with a salary and a sense of purpose. In many impoverished and isolate countries this is to prefer as there is no private sector whatsoever to speak of. In China, many elderly and disabled were given such seemingly meaningless jobs. Personally I find this superior to money hand-outs to the poor.
The second one is to have people fend for themselves. There are self-correcting mechanisms in the free market that matches the supply and demand of labour, however, this works mostly in theoretical models and not so much in real life. The USA is a country where the states involvement is relatively small and this has proven devastating to the unemployed. The high crime rate and increased child mortality is a telling sign of the poor and unemployed being neglected in the worlds only super power.
...and finally you have the middle road of ol' Siddharta. You'll find this in most European countries, especially in the Scandinavian countries. I'm not very up-to-date on Finland, but here in Sweden there are many - to be frank - inefficient and meaningless jobs for the disabled, elderly or long-time unemployed. Mind you, Sweden is no North Korea and it has one of the most competitive industries in the world, yet there is a need for jobs similar to the one one in North Korea that could easily have been automatised.
So, in conclusion, is easy to simplify and neglect the unique situation of different countries. For a country like North Korea, small, isolated and lacking a private sector, the state needs to play a very active role in managing excess labour and either give cash hound outs or employ them in one form or the other.