Re: "Innovations in digital finance,"
Yes, but there have been a steady stream of "innovations in digital finance" since digital computers first came on the scene. And before that we've had a series of innovations in analog finance for the past eight centuries or so.
Some of these are the well-known bugbears of middlebrow observers, such as CDOs and HFT. And perhaps for good reason; certainly the rating and pricing of CDO tranches was an awesome combination of dumb and mendacious.1
Others have added liquidity and resilience to the financial markets, enabling faster industrial innovation and growth, and increasing the range, quantity, and quality of goods and services available to consumers (in constant measures). Now, you can point out that industrial growth hasn't had much of an impact in inflation-adjusted pay over the past couple of decades, at least in the developed world; but it's hard to blame that on innovation in finance. And you can argue that overall quality of life doesn't necessarily correspond to how much stuff we have, but again that doesn't really seem to be finance's fault.
In short,2 financial innovation can have good effects, can fail miserably, can have some benefit but also have revenge effects, etc. It's not sensible to tar every new product with the CDO brush. And innovation is very, very important for those retirement investment accounts - growth has to come from somewhere. We can imagine a society that doesn't depend on it, but we won't get it quickly, and in the meantime a lot of people would suffer.
1And it's not David Li's fault. His paper was pretty clear on when the Gaussian copula does and doesn't apply, and it's not hard to see how it won't apply to mortgages that have common attributes, such as being for similar properties or for properties in geographical proximity. The quants deliberately ignored that.
2Too late.