If Peter and MJ were in charge of Stark Industries, they'd redistribute Tony's wealth right under his nose
This is an interesting theory. Apparently there are scenarios with MJ and Peter either surviving the Snap or Tony surviving Endgame. Tony puts MJ and Peter in charge of Stark Industries and the kids are total capitalists. But would they be? Being behind the scenes would probably cure Peter of his hero-worship pretty quickly. After dealing with Tony Stark day after day (instead of every few months) and getting access to the records of Tony's war profiteering, negligence, and exploitation of his employees, MJ and Peter may decide the best way to eat this rich guy is one bite at a time. (With a little help.)
Note: This is set in an AU where MJ and Peter survived the Snap but Pepper didn't. I haven't seen Far From Home, so folks may be out of character.
***
Ned did his final checks and closed his laptop. He said, "All of my 'Make Friday Hide the Evidence' code is still in place. Stark still has no clue what's going on."
MJ snorted and said, "How could he? He doesn't give a damn about anything but his fun and his toys." She clenched her fists as she thought about all of the devastation in the world, even so long after the Snap. And she got even angrier as she remembered that Tony Stark not only ignored what others were going through, he didn't even spend a dime of his hoarded billions to help. All of that money from the blood of people killed by Stark's decades of making weapons and not caring who bought or fired them...
Peter laid a hand on MJ's shoulder and said, "But that's a good thing, right? It makes our jobs a lot easier."
MJ leaned into Peter and said, "You're right. We're doing a lot of good, and making things right."
Ned said, "I'm putting the final touches on our next phase of the plan."
They'd started small. When Tony Stark "adopted" MJ and Peter and handed them the keys to Stark Industries, Peter thought he'd love being Iron Man Jr. But then Peter had spent actual time with Mr. Stark. He actually...wasn't so great, close-up. Peter had always thought the way Mr. Stark talked to (and about) Aunt May was kind of cringey, but Mr. Stark treated his employees even worse. Stealing credit for their ideas, talking down to them, harassing them. It was pretty awful.
Then MJ found the locked files in the system and asked Ned to take a look. After Ned reprogrammed Friday to hide their tracks (and beefed up security because THAT was way too easy), MJ and Ned went through the files. Years of shady deals with the government and status reports signed by Mr. Stark, but plenty of proof that Mr. Stark never bothered to check on anything.
The accounts were the last straw. All those multi-billions, just sitting there in Mr. Stark's accounts while so many people were starving and homeless. Well, the Eat the Rich Trio (ETRT, Inc. for short) got to work. Skimming money from accounts. A little friendly blackmail of Stark's business associates. Investments in projects that would help the world but not turn over huge profits. And of course making sure it was Mr. Stark's personal funds that took the hit.
All three of them glanced up as Mr. Stark himself walked into the conference room. He said, "Hey kids, how's it going?"
MJ smiled and said, "Things are going great."
Mr. Stark nodded and said, "I knew putting you in charge was the right thing to do. I have the BEST ideas."
Peter asked, "Did you need us for something?"
Mr. Stark waved a hand and said, "I'm thinking of moving permanently to the lake house. Get away from it all to focus on my next big plan."
Ned opened his mouth to protest. They'd seen the design for the "Big Plan." It looked a LOT like that Project Insight Captain America took down a few years ago.
MJ kicked him under the table and Ned closed his mouth. Probably remembering that they couldn't directly meddle with Mr. Stark's projects or he'd catch on to what they were doing. Peter decided he'd make sure Ned got the chance to sabotage the manufacturing part of the project. It was the least they could do to protect the world.
Peter waved with the others as Mr. Stark left. He smiled as he marked another charity anonymously helped by funds "recovered" from Mr. Stark. Peter realized that he could look out for the little guy, even without the Spider-Man suit.