Here in Uruguay, I've worked at a software factory (Urudata) that expected us to use a suit. I'm used to suits, so I didn't mind (I also like looking professional, and a suit signals that).

Now I work for a financial institution, so a suit is expected.

The US seems to have a much more lax attitude with respect to attire (especially for professionals, a University graduate is expected to look smart here). The "stick it to the man" point the article makes is beyond me.