HATE it when people walk around complaining 'There's no work. Nothing to do'.
Perhaps there actually isn't any work. May be it is just a slow day. There is also a possibility that you are not considered responsible enough to be tasked with an assignment that may be of some significance.
You blabbering away about not having anything to do just makes the department look bad (in case you happen to mouth this in the presence of senior management).
Another plausible explanation could be that whenever you have been assigned a task, you have complained that it is too much OR too complicated OR you have just done a really shitty job with it.
If you feel you are getting paid for doing nothing… SHUT UP about it and take your bloody pay-check. Be thankful that you have a 'proper' last name that allows you to remain employed. Most people would like to have a regular income without having to do anything. If this is happening to you, then it makes sense for others (who aren't getting this wonderful treatment) to complain and crib about you… but YOU complaining about it makes no bloody sense!
Don't like/need the extra/easy money? Don't take it. Feel free to resign. You aren't doing anyone a favour by sticking around. If you actually had the ability to think, you would realise that someone has done YOU a favour by allowing you to have the job in the first place.