Saying you're richer than someone would either imply that you have twice the amount of money required to qualify someone as "rich"/twice the amount of the person on the latter half of the two in terms of wealth, or you have ≥ a penny more than what the other person has, amirite?

Wuh

Except that rich is relative. There is no such thing as a single qualifying absolute amount to be defined as rich. A person of average or even below average wealth would still be considered richer than a homeless person. The suffix 'er' describing something as more has nothing to do with specific numbers. All that "richer" implies is that they possess any amount of wealth more than the other person.

Maybe you're talking about how well marbled your body is. Like...look at my flank steaks... Far richer than your scrawny blue collar butt.