[gcheong]

Productivity has been gaining for years while the number of working hours per week have remained the same and wages have stagnated or even declined. Why should I believe more productivity on the lower end will restore the middle class?

[lenerdenator]

Because if you do believe this, Marc Andreessen's personal net worth increases by the annual economic output of a rural Midwestern county in the next week.

You're right to be skeptical. Don't believe them. Demand a greater slice of the created value for yourself, and until you get it (and it manages to have a positive impact on your finances - see inflation), tell these people to shove their whitepapers where the sun doesn't shine.