Money. No matter what you may have, strength, smarts, or technique, it always comes back to money.
Perhaps that's why Gohan, fresh off of saving the world, found himself hiding the mail from his mother. She'd surely faint if she saw the absurdly high water bill, electricity bill, and their recently acquired satellite TV wasn't doing them any favours. Simply put, they didn't have enough money at all, with the Ox Kingdom having been disbanded long ago, and Goku's tournament winnings having dried up over the past thirteen years.
This is all also why he found himself sitting in front of Bulma's desk at her main office, dressed in the best formal wear he could muster- a plain white button down shirt, black pants, and sandals. He does come from a pretty rural area after all.
"Well, I can help you and Chi-Chi out..." Bulma began, reading over the bills Gohan had given her, before running some numbers on her computer. "It wouldn't be too hard, but you know I don't like charity work. Chi-Chi doesn't like being a charity case either." The last Capsule Corp BBQ had been a reminder of that.
"How about this, you come work for me as my secretary. With our brains together, and your Saiyan genes making you an impressive body guard to boot, it could work out pretty well, don't you think?" Gohan laughed and rubbed the back of his head in embarrassment, missing the brief moment where Bulma licked her lips, like a predator eyeing a piece of meat in the wild.
"That sounds great Bulma!" Gohan cheered. Hey, city life could be nice. At least he wouldn't just be studying all day. "So, when do you want me to start?"
"Right now would be perfect actually." Bulma sat up from her chair and walked over to her closet. Opening it up, she reached in and brought out a small rectangular box that just had the Capsule Corp logo on it. "I've been incorporating Freeza's tech into our uniforms, so they're one size fits all now! Let me know if there's any issues."
Gohan grabbed the box and immediately dashed out of the room, going across the hall and into a washroom. Stripping down, he looked in the mirror with an embarrassed expression- he was the strongest guy on Earth, but it sure didn't show. No muscle definition, just a flat chest and abdoment, lithe arms, heck, his thighs were even a bit chubby. Worst of all was his height- Vegeta warned him that Saiyan growth spurts happen all at once, but he was still so short! Even Krillin had a few inches on him. His other parts also weren't too impressive...
He shook his head and opened the box Bulma had given him. Inside was...