That's just another false comparison. For length, the quantum unit for everything is the planck length. Anything else is arbitrary. Calling 1 meter a "base unit" for this or that is just something someone decided one day. In currency, the base or quantum unit is the smallest indivisible unit in common circulation. For dollars, that's $0.01. There are no half-pennies in circulation. For Rupees it's one Rupee. If the currency is named after the quantum unit then you can get away with any slang for any higher amount, the whole ratio thing no longer applies because it’s not the same problem. If the currency is *not* named after the quantum unit, as is the case with dollars (cents being the quantum), then the ratio problem does indeed come into play. So you have to find an apples to apples comparison.