$100k is about $72k after tax[0].
Suppose I want to support a family in NYC. Average cost of living is about $9,000/mo for a family of four[1].
That's $108,000 per year. Or about $36,000 above what I would need to support an average 2-kid family, living paycheck-to-paycheck.
So if I want to be able to support a family, 100k is not even close to enough.
edit: forgot to add the sources
[0] https://www.talent.com/tax-calculator?salary=100000&from=yea...