I don’t want to oversell that kind of thing as a factor but I really think there’s a cost to scale when a business reaches the point of impersonality where you don’t even know or have much concept of the existence of the people affected by your decisions.
There are several industries (microchips have recently become one) where finance has figured out the normal rules around competition don't matter. Boeing can capture the upside and there is virtually zero risk of bankruptcy or being nationalized from mistakes.
I don't think a quantity argument is interesting (there is definitely more regulations). Possibly there is a quality argument to made: Due to the regulator capture process (large corporations have seized control of the federal government), the effectiveness of regulations have decreased a lot while the volume has increased. This also serves as a barrier to entry for competition, while also profits for compliance.
Now interesting question is when did the effectiveness or regulation peak?