alt Hacker News> The same applies to "horse-power". Yet we have no issue making the comparison anyways and HP has become an industry standard.
Yeah, which is why it's only used to compare cars etc. among each other. Nobody would calculate the equivalence of a car to a horse using their HP rating because a horse doesn't even have 1 HP. They have more or less depending on the task you're doing. It was a marketing thing at the time to make steam engines look good.
In france, cars are taxed by their engine power. Do you think pedestrians walking on the sidewalk should be taxed according to their power on an ergometer too?
Do you not see that different things need to be handled differently before the law and just taking an arbitrary measure that you can technically apply to both doesn't capture the situation?
> It was a marketing thing at the time to make steam engines look good.
Except it is actually taxed based on HP in various countries. Austria, Belgium, Spain, Italy use engine horsepower to levy annual car taxes.
> In france, cars are taxed by their engine power. Do you think pedestrians walking on the sidewalk should be taxed according to their power on an ergometer too?
Citizens are paying taxes for betterment of roads irrespective of whether they own vehicles or not. In India, betterment charges are collected for construction/maintenance of roads if you own land. Property tax collected every year has a certain allocation for maintenance/upkeep of roads. Apart from that, money from direct and indirect tax collections are allocated for roads upkeep as well. It just is done indirectly rather than a direct road tax if you have vehicles (road tax is actually an extra tax you pay APART from taxes you already pay for upkeep/maintenance of roads).
> Do you not see that different things need to be handled differently before the law and just taking an arbitrary measure that you can technically apply to both doesn't capture the situation?
Except in your own examples it can easily be shown that it is not handled differently. Some countries use HP while others use CC. But end of the day, they use some measurement to determine taxes to be paid. It is not free.
EDIT: Do you not see that different things need to be handled differently before the law and just taking an arbitrary measure that you can technically apply to both doesn't capture the situation?
To answer this in more detail: HP/CC and all other measurements were created to equalize with human specific metrics. Bridges, for example, have safety measured based on how much weight it can sustain at any given time (called load limit). Weight, in this specific case, is an equalizing measurement (it can be in tonnes, kN, PSF, Pa etc). A bridge can hold ten thousand humans or thousand trucks. You can argue that a "human" may not weigh 100 kgs or a truck may not weigh exactly 1 ton. That's fine. It is a rough approximate to equalize unequal entities.