Is making Shrine from Gold a sin?

I have been asked this questions many times, That why the zarih of Imam Hussain and Moula abbas (and many others) is made of Gold. Sometimes it is referenced that > "Gold is forbidden(Haram) for men, and it should not be used this way, and sometimes it is said > that money with all this gold, could feed many needy people". I am looking for a better logical answer. I know the ideology of Wahhabi school of thought(since they talk about razing prophet SAWW shrine 1 2 3 ). Other than that any reasonable answer would be appreciated.