It's hard to turn in to a hourly cost, because the coverage is binary; an employee works enough hours to be covered or not, and the cost of health insurance for the worker depends mostly on the worker's age, not on how much they work.

Of course, we're talking usually like $500 or so a month, varying dramatically on age and quality of the plan, so in no case is it gonna be anywhere near $0.10 per hour.

Workers comp can usually be broken down to a per-hour cost; and for, say, an underpaid computer nerd, $0.10 per hour is a minimally realistic workers comp cost, so maybe that's what parent was talking about.