Actually it seems you are the one who does not understand. When this work is being done they employ people for a pretty good wage. Those people pay taxes. Any time you increase taxes on companies they raise prices so they can pay the taxes, meaning, we pay them regardless. It is through jobs that most of the money comes into the coffers, always has been. 

Much of out problem is companies like GE who sell their goods here, pay zero tax and farm their work out over seas. Trump said he has a plan to bring those jobs back. IF he does, and IF he follows through it will be a big deal. IF.