One of the things that we see when magazines report about billionaire CEOs is that they will invariably mention just how hard they work, how much time they spend working. Even if they are from "old money," they are adamant that they have worked to deserve their wealth.
Reading Jane Austen, in the Regency period, it seems that having to do anything to obtain your wealth is seen as lesser, the best men have inherited it. Being in the Trades, whether it be as a lawyer, doctor, or banker, is still looked down on.
When did idleness change from a virtue to a sign that the wealth was not deserved?
There is always more to be said, but I have an answer to a similar question which may interest you: Why did the ultra wealthy start having nominal occupations instead of just being aristocrats?