Money is certainly the best motivation for anyone, people want to work with professionals and develop anything of course because of the motivation of money, on the other hand many people are trapped by money because they can become criminals, thieves, corruptors and so on because they are motivated by money.
The motivation caused by money sometimes if it is too high then it can indeed make a person act outside of morality. They justify any means to be able to get more money. So this is where it is important for us to have life principles and stick to morals. so that we are not controlled by the motivation of money. but we have to keep making money in a healthy way and a way that doesn't harm other people.
vaild point mentioned - the point you have stated that some times it makes people act weired - i think its not sometimes its most of the tume