“This is because setting up legacy retirement plans required months of work, and involved working with lawyers, advisers and others to design and implement a plan,” Schneble told Crunchbase News. “These plans were also expensive and time-consuming to administer once set up.”

https://news.crunchbase.com/news/human-interest-raises-40m-series-c-to-close-retirement-savings-gap-for-smbs/