Not all the funds are that high. The .18% vanguard quotes is their real, across customers, result. Their more active funds are higher (like VEXPX at .49%) while their larger scale Admiral funds are often as low as .05% (like VTSAX).
Vanguard ETFs offer the same rates as the equivalent Admiral class shares, so services like Wealthfront use those. Wrapping Vanguard is a lot easier these days ;)
how does that compare to other fees all in? Obviously the employee cost is really good, but is the typical 1-2% employee fee company just passing that $8 onto you? Especially in lower paying companies, that could add up
Could you elaborate on how you got those numbers? You lost me at $56 but I don't understand your percentages either so perhaps I'm missing something here.
My guess is that they're focusing on new plans, not allowing rollover from previous plans and not allowing employees to keep the plan after they leave the company. In this situation they're able to have mostly savers with low or very low balances, and they charge on average higher fees than Vanguard and others.