In that case. I agree - A person making $500K should be able to write a check for $10K (for an unexpected expense, say, like new windows) with much greater ease than one making significantly less.
But that presumes responsible spending, and that’s not a universal situation. So, they should, but I have seen irresponsible spending folks making that kind of money.
Still, a grande coffee at Starbucks is $3.00 to both people.
The top 1%, by the way, is still slightly above your $500K, so, that person is not “well into” the top 1%, they’re just on the cusp.
Further, and this is really important, the top 1% is very transitory, and an earning level that represents the apex of a career. The 1% tend to be people between 55 and 60, who have reached the apex. You don’t just zoom up to 1% and stay there, in many cases, you spend just a few years there and then drop out.