The effect would be exactly the same if they went to work an hour earlier. If we want more daylight hours after work as a society, start the work day earlier.
Tell me that you are kidding? You have ONE DST that you can adjust and then you have millions of businesses to adjust. Which one do you think is easier to do?
Bingo!
A LOT of places now have Flextime anyway...
https://www.google.com/search?q=flextime+guidelines&ie=&oe=