Forced labor camps is what stands instead of simple prisons in ex-USSR, simply because of poverty of those countries. The same category of people (chronic, multiple repeat offenders who provably have no intention of changing their habits, and as a result of a due process and a court sentence), shall just go to prison in these countries.
They might turn out to be one of the rare categories of people who prison actually fixes - one motive of being a bum is having absolutely no bosses, no mandatory routine, and being able to completely disrespect any kind of rules or authority - being in prison where you are forced to do otherwise for a number of years might actually change that habit (while i am not criminologist, this one admittedly might be bs).
And if you meant the forced labor as an administrative sentence, it's not something horrible, these are not gulags. Aren't people forced to do community work by say, cleaning the streets or assisting nurses in hospitals/nursing homes for misdemeanors such as drunk fights or driving drunk in Western countries? This is same kind of thing.
If you don't like the idea of LTP, then well, i don't like it either, but you have probably little idea of what's called an alcoholic in Belarus - where most adult male population are alcoholics, clinically speaking, and under 1% are risking getting into these LTPs (and most of them are not bums, typically police would send someone there once they realize that he's one binge away from stabbing his wife to death).
Sure, in the West where most people aren't forced to live where they were born because of being dependent on relatives network safety net and/or can afford to buy or rent homes, simpler solution is segregation (soft: basically not trying to artificially slow down market forces that tend to naturally increase the poor/rich communities split) and better policing of poorer areas, but this is what liberals are strongly against, so i'm not really suggesting it.