It is a known and unfortunate phenomenon that regulation winds up creating moats even if in service of good ends and intentions. Pulling up the ladder effectively happens to the benefit any incumbent who can afford something far more than upstart competitors. If say, a scrubber stack on factories doubles the equipment costs it favors the existing factory owners even if retrofitting is a hefty expense, it would buy them a moat.

Stopping on their own has to do with cost benefit analysis and is thus circumstantial. For a sort of in progress Amazon openly admits that they need to reduce turn over because they are running out of hiring pool. Their work conditions are still infamous but they set standards. That could ironically potentially mean a more competitive environment could have had worse wages. Not an arguement against it being a problem but an amusing irony.

Similarly deeper pockets mean a need to be less reckless as big payout judgements become collectable. If a fly by night roofing company has a worker fall and break their back from lack of safety equipment it may only have a few hundred thousand in assets total. If it is a state wide one they could be on the hook for millions.