[bwestergard]

"reducing net hours worked by 20% isn't going to have market success."

The forty hour week also wouldn't "have market success" (i.e. allow many individual firms to move to it unilaterally). But it happened because organized workers compelled a few employers to adopt it through labor stoppages. This in turn created political momentum for the standard forty hour week in the legal form of collective bargaining agreements and/or working hour legislation.