If you go digging, find it, you can become rich. What does it mean to be rich? It is having the ability to influence what other people will do by offering or having the potential to offer them money, which again, would grant THEM influence. Etc. If you can become rich without doing actual work, you devalue all the gold already in circulation by adding the gold you found to it when you spend it, or exchange it for something else. You achieve an increase in your influence without adding value to the overall economy by DOING SOMETHING PRODUCTIVE.
One point of note; Since when is digging, creating a mine, or any other such manual labor unproductive or not "actual work"? Under your belief, what exactly qualifies as actual work? Please clarify.
"Mr. Spock succumbs to a powerful mating urge and nearly kills Captain Kirk." -- TV Guide, describing the Star Trek episode _Amok_Time_