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How many houses did investors build vs how many houses did the government build…Strictly speaking the answer is zero and zero. They use the money they have to have construction workers build the houses.
> from the money they actually took from somebody else?
Is this supposed to imply someone is taking money from others and the other does not? I know the view that government taxes is basically theft, and I think this view is ludicrous: citizen get that back in the form of infrastructure and public services, and in a functioning democracy it's basically their collective will that decided how to allocate that money. (How functioning the democracy really is is another debate.)
Investors on the other hand… well there are two kinds: those who worked for their money, and those who took it from workers. And it's a spectrum too, it depends how much of your income comes from your work, and how much comes from your possessions. Now I can guess most small landlords like yourself probably paid their houses with money they earned through actual work. Some even have constructed the houses themselves. But if that Second Thought video https://www.youtube.com/watch?v=m1m7WmKJZyQ has any accuracy the majority of rented houses are rented by big landlords, and those definitely did not earn their money through their own work (the clerks that work under them do, but they don't own the houses and are paid a meagre salary, compared to the renting money they manage).
I can't speak for government constructed houses, but given the above, your average investor-owned house was constructed or bought with money that was taken from people working for the investor. (Well strictly speaking the worker creates value for their boss, which gives a salary in return, but there's always a difference between value created and salary returned. That difference is the exploitation/theft part. And I'm glossing over the fact that managing a company is valuable work unto itself.)
> And which houses are nicer, safer and better maintained?
Am I supposed to answer "the investor's houses"? A citation is needed for that answer, and it'd better control for when the house is build (construction norms tend to evolve over time), how much it actually cost, and in some cases who it actually cost. Suburbian houses may be nice for instance, but the car dependency and the unsustainable infrastructure costs definitely are not.