It would be a very bad idea to try and increase the supply that is one of the main reasons for the value of bitcoin it is a limited supply which is actually less than the 21 million with the amount of lost coins out there.
Increasing the number of bitcoins will severly devalue the currency but again comparing it to Gold, there isn't a fixed amount of Gold in the system like Bitcoin. So maybe if the value is unlimited it is not going to cost any problem at all.