A space elevator would actually be a very, very good thing for us. Raw material comes down, people and cargo go up. And cheaply too.
Maybe you had't noticed, but the earth is kinda overcrowded. Employing every person in the country would only exacerbate the problem whereas taking steps towards colonizing other worlds would go a great deal towards alleviating said problem. Not to mention the jobs that will be created when such a feat is achieved.
"Teach a man to fish..." and all that.
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