But doesn't it cost more than $125k to pay a $125k salary? I've been told that it's about 1:1 if typical benefits are involved. So a $125k salary costs $250k.
The only other data point is from the Bureau of Labor Statistics Employer Costs for Employee Compensation (BLS ECEC) where it shows at the bottom that benefits accounted for around 30% of total compensation and 70% going to wages & salary[1]. On average, this means that a $125K salary would cost a company $179K overall.
[1] Ex-CTO
Those ratios are for average salaries, not $125k salaries.