It appears that Uber has systematically structured its pay system to underpay women:

Uber Technologies Inc. is being investigated by the U.S. Equal Employment Opportunity Commission after a complaint about gender inequity, according to people familiar with the matter.

The inquiry, one of a series of federal probes of the ride-hailing giant, began last August and hasn’t been previously reported. EEOC investigators have been interviewing former and current Uber employees, as well as seeking documents from Uber officials, the people said. They are seeking information related to Uber’s hiring practices, pay disparity and other matters as they relate to gender, one person said.

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Uber has struggled to overcome a reputation for being permissive of chauvinism that was largely sparked by former software engineer Susan Fowler’s viral blog post in early 2017.

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Last week, Uber pushed out its human-resources chief, Liane Hornsey, following an internal probe of her department’s handling of racial discrimination claims. And Uber Chief Operating Officer Barney Harford, hired by Mr. Khosrowshahi from their former employer Expedia Group Inc., last week sent employees a letter of contrition after internal complaints that remarks he made were racially insensitive. The New York Times earlier reported on Mr. Harford. 

Uber abides.