Laissez faire is actually pretty good in the mid game. The trick is to make sure that you have at least one profitable factory in each province, this will generate enough money for your capitalists to eventually industrialize your nation. If you do not have this one profitable factory, then the Capis will typically build one awful factory in a state, which will close and they will then remain bankrupt for the rest of the game as they do not have enough funds to recover.
To fix this, I usually switch to a State capitalist government in the early game, and build a Steel Mill wherever I can, A Lumber mill wherever possible, and a concrete, glass or fabric factory everywhere else. I will typically try to build a few steamer factories once I get the tech. Once I have that going I can usually have a LF government for a few decades until the whole Electric Gear/Automobile era where I will try to manually start up those industries.