Liability Limits on Taxis

In NYC when it was noticed that people were not getting proper compensation for the staggeringly high losses, they raised the liability limits. In Massachusetts the minimum mandatory liability coverage is the same as all other Mass cars, as it is for taxis. 10/20/10 coverage is inadequate coverage for taxis, by virtue of the fact that taxis have much greater exposure. It is even less satisfactory because of the tremendous risk involved in using sub-standard, un-certified, non-complying interior partitions. Rather than raise the liability limits (only because of partition risk, as they did in NYC) to some astronomical amount such as 500,000/1,000,000/500,000 (which would still be inadequate for partition head injuries) why not get rid of the partitions or at least be sure they meet minimum federal safety standards?