I think they mean "better deal" to be taken ironically by the readers, who likely have little sympathy for cab drivers. Unlike most public unions who are paid by taxes, the electorate is directly and visibly affected by taxi price hikes. So public support for them is naturally much lower than the unions the rich people pay for. Probably anyone reading this is laughing along. They are thinking that fifty cents per thousand feet driven is more than a fair fare (that is the current rate for SF cabs).

Edit: it appears the strike is more about the credit card fees companies charge the cabbies, digital tracking of the cabs, tvs in the back seats which show adverts to passengers, and various other anti-consumer and anti-driver practices. In this case, I can see that public support might be a little higher. I don't like either cabbies or cab companies, but if I had to pick which I like least, it's obviously the companies. In this case, the fair deal bit might be meant unironically.