Everton announced a club record shirt sponsorship deal with Chang on Thursday which will bring in £16million over the next three years.
However, Manchester United's new shirt sponsorship deal with Chevrolet, which starts next season, is reportedly worth £340million over seven years, while Chelsea and Manchester City have both benefited from huge financial backing in recent seasons.
Martinez would welcome more money at Goodison Park, but he has insisted that it is more about how the finance is used and he is happy with the support he receives at Everton from chairman Bill Kenwright.
"Of course it is about finance, but there's no good in feeling inferior to the others if you haven't got the same finances," said the Everton manager.
"I always thought in football you take what you've got and then take the most from it. That's why you look at the loan market and you look to youngsters.
"I don't think it's set in stone that having finance guarantees you success. If you asked me would I like to have more finances, of course, but that doesn't necessarily guarantee you success.
"If you want to challenge Man City or Chelsea financially, it's not going to come from getting a good [sponsorship] deal or not, it's a lot more than that because the disparity in finances is huge. So I'm not too worried about that.
"The board has been very supportive, the chairman has been very supportive and he's allowed me to manage the football club in a way that means everything we produce can be reinvested. That's all I want.
"It's not about the number, it's what you can do with the finances that come in. Sometimes you're in a position where you need to meet payments and you can't reinvest in the squad. That's not the case at Everton. Whatever comes in can be reinvested in the squad."