I believe that if a company treats their employees with respect (automatically give them cost-of-living raises without them having to ask for it, for example) and like humans instead of cogs in a machine, keep them intellectually challenged and fulfilled, and give them a sense of meaning and purpose, then they're likely to stay much longer. If you're doing that then they're giving your customers the same attention. So maybe you have a thriving business that employees will stay at for their entire career.
Contrasting that with my experience I can name one company in 30 years that did that. As is so often the case in our society, everybody is doing it backwards and wondering why everything is broken.
That seems: a) far too broad - if an HR assistant can't be replaced at a startup, why not? and b) a calculated risk - for certain things key people are just necessary to begin with, and if they leave it causes a massive issue. Startups aren't choosing that issue; they are just hoping it doesn't materialise until they have the normal way of doing things in place.
Contrasting that with my experience I can name one company in 30 years that did that. As is so often the case in our society, everybody is doing it backwards and wondering why everything is broken.