Our solutions are sometimes a bit clunky but our infrastructure is audited yearly by an outside firm and certified to carry banking data through the wireless device we designed and through our network. There is another 15-20 people doing financials, payroll, hr, tech support, sales, marketing, assembly, hardware testing, shipping etc..
We maintain multiple backend interfaces to a bunch of (sometimes old and archaic) bank networks and to our wireless devices as well as multiple front end portals for our users.
It's hard to imagine ever being able to make use of 57000 bodies, but I suppose that's a totally different context. We could use a few more.
Alternatively, a quantitative measure of effectiveness is the company's revenue or net income per employee. For 2015, that's $1.2M / Googler or $264K / Googler, respectively.