If you live in a first world country, try to find out what your mid-tier technology consultancies (Accenture, Deloitte, CGI, etc) are charging customers. It is almost certainly around 250-350k per year, even if they are working for an unglamorous, boring, traditional customer. The real issue is that outside of leading tech environments, too much rent is being extracted from the wages of software engineers.

Pre-2008 not all banks were hugely profitable. Some investment banks were and some smaller companies. The tech sector isn't that dissimilar. Salaries in SV show that not only Google and Facebook are willing to pay $200k+ for engineers, most of the industry will (and usually can).

As tech can't print money, these salaries must come from somewhere. And at some point those sources won't be able or willing to provide it. Maybe that's a soft landing, maybe harder. I don't know but as I said previously, I'd be surprised if tech's the first industry in centuries that channels wealth into the hands of few (including SV landlords) without any consequences.