What industry could survive with an arbitrary imposition of a 65% curtailment in working days?
How do you pay for your capital equipment?
And on a more basic note, from what employment pool do you gleen your workers? (Sure guys, come work for me, I promise you you will have a minimum of 237 days off each year. We only fish for 128 days each year. Of course that makes it a part time job. You don't get benefits and stuff. And you will only receive about 40% of the pay you might otherwise get in any other job.)
Whenever I look at these detached, marble headed, overly simplistic "solutions" which are offered by enviros, I am reminded of an old joke about how you turn an elephant inside out.
It's real simple. You just grab him by the trunk, and snap him inside out!