Yes, it is very possible to increase the supply of the bitcoin or make it more or even make it infinite but the thing is that it is very hard to crack the code because you will also do the re-arranging of the blocks which is even the smartest people can't do that thing. So if you are asking if it is really possible to increase the supply then probably the answer would be "Yes" but it is kind of a hard job to that thing. Just think why the government didn't print so much paper money? it is because there is only fix money that we need to be circulated.
You really do not need to crack anything if you want to increase the number of coins in bitcoin, all you need is a consensus between all the parties involved but the fact remains that there is no need for the increase in the number of coins and if the developers does anything then it will affect the entire market.
When you are talking about government printing money, it was done and there are countries struggling with inflation because the government printed too much money and flooded the market.