An interesting point is made by the Baal HaTanya. Personal advice such as finances were never asked of a talmid chachom but only a prophet. This is clearly stated in Koheles (9:11). This is perhaps a reflection of believing that everything is determined by Providence as opposed to the view that talented people with intelligent plans are more like to be successful Thus he seems to be asserting that a person's success is always determined individually by hashgocha protis - and not by rational planning. The role of a gadol is to give advice in avodas HaShem and spiritual matters. This is related to my previous question as to whether a person should monitor outcome and modify his behavior to increase success. This seems to be consistent with the Chovas HaLevavos that hishtadlus is only a precondition for success but doesn't determine it. Therefore there is no need to modify ones efforts or change jobs because there is no causal relationship between specific type of effort and success.
Koheles(9:11):[Shlomo said] I returned, and saw under the sun, that the race is not always won by the swift, the strong don’t always win the battle, the wise don’t always have bread, the men of understanding aren’t always wealthy, and the talented aren’t always favored. In fact they will only sometimes be more successful than others but all of them will find that at times their successes or failures are apparently random.
Baal HaTanya(Igros Kodesh #22): My dear friend… Has there ever been anything like this since the beginning of creation? Where can you find in any one of the books of Jewish sages – whether of the earlier period or later period - to have an established practice of asking advice concerning secular matters such as what to do regarding some mundane issue. [This wasn’t done] even from the greatest of the ancient Jewish sages such as the Tannaim and Amoraim -- from whom no secret escaped and for whom the pathways of heaven were clear. In fact asking advice was only done from the genuine prophets such as those that used to exist amongst the Jewish people. For example Shmuel the Seer was asked by Shaul about the donkeys his father had lost. That is because in truth all matters pertaining to a person – except those having to do with Torah learning or fear of heaven – are not comprehended except through prophecy. As it says, “And the sage has no bread”(Koheles 9:11). Our Rabbis have taught, “Everything is in the hands of heaven except for fear of heaven.” They also say that 7 thing are concealed…and that no man no knows how he will profit… and when the House of Dovid will return… You should note that these are equated to each other. And this that is says in Yeshaya, “A counselor and a sage who silences all,” and also, the statement of our Sages that people “benefit from [a talmid chachom] by his advice and sound wisdom” – that is referring to his words of Torah which are called “sound wisdom.”…