The only way this would work is via unilateral gov policy, which in recent years are common in mega-trade deals (as some politicians have called it the "gold standard" of state/capitalist countries policy), and which is exactly why Bell never tried to do it privately themselves.
Much like the majority of the worst examples of major corporate abuses in the paste few decades they have almost always been businesses who are close friends with government. Often in the most heavily regulated industries: telecom/ISPs, pharma [1], finance [no citation needed, see post-2008 policies which crippled small-bank competition and reduced the market to 5 mega-banks], and energy - as we've seen recently with PG&E in California:
https://www.wsj.com/articles/when-politicians-direct-capital...
Despite rhetoric about "corporate greed" causing the PG&E safety lapses, the California government has played a massive role in controlling PG&E's capital expenditure and safety policy for two decades (including giving them a free pass from any market-consequences after a similar fire in 2017) AND they already charge the highest per person energy costs in the entire country.
Given that forced mandate PG&E simply couldn't have afforded the money on those massive safety improvements even if they wanted to (without further burden on tax payers), they were already pushing their customers to the max via state influenced spending policies on climate change tech. Plus what incentive did they have when they had 1500 other incidents and their friends in gov repeatedly gave them a free pass?
[1] https://en.wikipedia.org/wiki/List_of_largest_pharmaceutical...