[gsuubvjhsb]

If they become rare, wouldn't the market supply more cabs? I mean, how do you think food supply works?

[gambiting]

I think you are the one who doesn't understand how food supply works. Stores stock items which are popular - not ones which sell rarely. If disabled passengers are less than 5% of all taxi passengers, private companies might ignore them entirely because they are not worth the investment into their fleet.

[kd0amg]

"The free market will fix it" has historically not been an effective answer to problems the disabled have.