"The fully-loaded costs of employees are much higher than their salary: exactly how much higher depends on your locality’s laws, your benefits package, and a bunch of other HR administrivia, but a reasonable guesstimate is between 150% and 200% of their salary." -https://www.kalzumeus.com/2012/01/23/salary-negotiation/
I'd hypothesis that most employees on whom companies spend $10k for cloud software are making $100k+.
But even so, the average salary in the US is < $60k. Use whatever multiplier you want, $200k is way high.
Companies are spending far less than $200k/employee all-in.
So to slightly rephrase the OP's question:
> Do people really believe that $100k is a normal salary?
But it's pretty obvious that a basic "customer support" combo like Office 365 + Okta + Zendesk + Intercom + Slack + Zenefits starts to add up to a meaningful percentage of the employee's take-home compensation. (Remember these are positions where $20/hr is a good rate.) And remember, the comparison figure for managers over 50 is roughly $0, which approximates the spend on these functions as far back ago as 2008.