There is no incentive for the industry to do better. As for government penalties being an incentive: If it was popular amongst the voters to hold corporations

There is no incentive for the industry to do better. As for government penalties being an incentive: If it was popular amongst the voters to hold corporations seriously responsible, you would see politicians campaign on it and win. It's not nearly as popular as virtually anything else based on empirical data. Another way to say this is if 80% of all voters, regardless of party prioritized this as the #1, #2, and #3 issue, politicians would pass laws. It makes the politician look good and solidifies their reelection. Likewise, politicians that vote against those laws would almost certainly not be reelected.