What Net Worth Puts You in the Upper, Middle & Lower Class?

I watched this video a couple weeks ago, and while it has nothing to do with FI, I thought it was quite interesting how he divides the economic classes. TL;DW:

• lower class ($34k income, $3400 net worth) - ~25% of population - truly struggle with emergencies and flirt w/ the federal poverty line; net worth is pretty much nothing (often negative!) due to student debt
• middle class - three categories (lower, middle, upper)
  • lower ($44k income, $71k net worth) - ~20% population - identify more with middle-middle class and tend to get into more debt than necessary by trying to keep up with the Joneses, but could be financially stable w/ some discipline
  • middle ($81k income, $159k net worth) - ~20% - financially stable, most of assets are in home
  • upper ($117k income, $307k net worth) - ~20% - passive income and compound interest supplement income; some live paycheck-to-paycheck due to lifestyle inflation (i.e. keep up w/ next group), but some can do really well with investments
• upper class - two categories (lower and upper)
  • lower ($189k income, $747k net worth) - ~10% - specialized professions; most people can get into the lower upper class with discipline (10% savings rate on $65k salary => $787k investments by age 50); little pressure from everyday expenses
  • upper ($378k income, $2.5M net worth) - ~5% - some college grads working as employees, but a lot of these are business owners

At each level, I see two types of people:

• savers - have enough cash to weather emergencies, tend to have upward mobility
• everyone else - tend to stay in that economic class, and may regress in retirement; routinely keep up with the Joneses and stay in debt

I personally have been in the middle to upper middle class for most of my career (started in lower middle class, but that quickly changed), and I'm shooting for lower-upper class to upper-upper class in early retirement. I didn't get any inheritance and don't expect any, and I haven't been particularly lucky with my investments (for every major win, I can show an equal major mistake), I've just been very frugal. Some details:

• car(s) - single car for most of my married life; currently have two at 16 and 17 years old; I do most of my own maintenance
• house - bought in mid-late 20s and haven't moved
• savings rate - was 45%, but it's now 35-40%
• current income - upper-middle class range, might get to lower-upper class if I stick with my career; about half my career was middle-middle class
• FI target - something like $50-60k spending/year, or $1.5-2M; I plan to be FI around mid-40s, and I intend to keep earning income after FI, but the nature of my work will change

Anyway, I really enjoyed this video, and I think it's interesting to compare myself to the various breakdowns, as well as forward to people who argue that the main thing keeping them down is income (despite being middle-middle class or above).

What do you think? Do you agree with the breakdown? What do you think the "minimum" income range is for someone who'd like to pursue FI?