Ah yes, the glorious Russian Empire.
Indeed, you make a good point. Slavery and serfdom are very profitable, and permit you to build long railroads. I applaud your wisdom and astuteness.
However in this utopia, there were a few downsides. Like how people believed pogroms kept Jews from hypnotising their wives, or how nobody could read, or how the prisons were filled with book smugglers. How Odessa was the capitol of organised crime, and how healthcare included throwing people into a plague pit and setting them on fire.
How the Russian Empire had a booming tourist industry, which offered civil rights unheard of in most places, such as running child brothels as part of their commitment to free enterprise.
How people even enjoyed the freedom to not pay wages, and how managers were allowed to whip disobedient peasants.
Indeed, the revolution destroyed all these things, and god bless Lenin for doing it.