Yes. I remember such advocacy efforts in the 1980s and the 1990s. The commercial trucking industry had a stranglehold on Congress at the time, though. Everyone kind of gave up during the 2000s. As far as I can tell, even gruesome pictures of children massacred by unlicensed truck drivers didn't get us any successful new regulations on the operation of the commercial trucking industry. (The corporate scheme was to blame everything on the driver and they'd set it up so that the profitable trucking companies didn't have any significant liability for hiring incompetent drivers, thanks to the way the insurance and corporate organization worked.) The mood may be different now; it might be possible to get the insurance minimum raised and indexed to inflation.