- Cost of labor is insanely high due to cost of housing. Short of jumping straight back into the 19th century, setting up temporary housing and bringing in guest laborers this is pretty much non-negotiable.

- Not a ton of expertise left in the country since there's 2 new subway tunnels a decade AFAIK.

- The grift has got to be worse here than in Spain. There if you get $40k in kickbacks that's a nice bonus, here that barely covers your rent for the year.

And then even if you bring the costs down, you have to figure out the taxation. Several billion per mile is the running rate and you may be able to bring that down but then you have ongoing costs. Muni's farebox recovery is only 1/4 of its budget so unless you're making existing lines redundant, there's new ongoing cost. Obviously the choices there will be to go into the pockets of the middle class or not do it at all.

and a server behind it like

``` mkfifo /tmp/myfifo cat /tmp/myfifo | nc -l 12345 > /tmp/myfifo ```

so if you manually type out

  CONNECT host:12345 HTTP/1.1
  host: host:12345

  curl -x proxy:3333 telnet://host:12345