The main problem I see with advertising is that it seems to largely exist to manufacture a demand for products, not to inform people about the differentiation between competing products. Everyone's working just as hard as they were 100 years ago, even though productivity has supposedly massively increased. Our increase in productivity seems to go towards getting people to buy into things that they probably don't need, like a new iPhone every year.
Why not halve the number of phones/laptops/ads we're exposed to in exchange for halving our working hours?