In short, repairability is too nebulous of a target for effective regulation. I think the appropriate angle for government intervention is to protect a "right to repair".
> A large part of the discrepancy is not automation, but cheap labour in the East where many of our products are made. Regulation can help redress than inequality...Regulation can address that by mandating reparability.
There are a number of ways to tackle this issue:
* reduce the regulatory and tax burden faced by small repair shops. Increased competition and lower overhead costs will drive down prices.
* reduce the regulations that impact the product design. Engineering is the result of navigating difficult trade-offs; the more aspects of a design we try to "fix", especially through political processes, the more complex the end result will be.
* broaden access to repair knowledge and tools. You don't even need regulatory changes for this one; It's an excellent opportunity for entrepreneurs. Part of the reason older cars are so easy to repair is that the tools and knowledge have become widespread thanks to third-party businesses that have found a way to supply those things cheaply and profitably. YouTube is a DIYer's dream.
> It's also worth thinking about why we consider replacement being cheaper than repair to be a problem at all - if you trust the market, what's so horrible about that? Real time saver right?
Sometimes it's not a problem. Is it better to use a paper towel is biodegradable and produced through sustainable tree-farming, or use a reusable cloth towel that increases demand for environmentally unfriendly washing machines and laundry detergent (and spend money on sewing machines and thread to repair holes)?
> the price of new goods does not reflect their full environmental and social cost
Nor would they with heavy regulation, because the "full environmental and social cost" is incalculable. Furthermore, there is no attempt to measure the costs imposed by the regulations and the net benefits provided (if any).