A common idea among the less educated people who call themselves “conservative” seems to be that they should oppose tax cuts for themselves and support tax cuts for the rich because they might become rich and they want to prepare for that possibility.
The US census data  shows that less than 1% of males aged 15+ earn $250K. For females it’s less than 0.2%.
On the Wikipedia page about homosexuality  it is claimed that 2%-7% of the population are gay (and 12% of Norwegians have at least tried it out). Apparently homosexuality can strike suddenly, you never know when a right-wing politician or preacher will suddenly and unexpectedly be compelled to hire gay whores (as Ted Haggard  did) or come out of the closet (as Jim Kolbe  did).
So it seems that based on percentages you are more likely to become gay than to become rich. So it would be prudent to prepare for that possibility and lobby for gay marriage in case your sexual preference ever changes.
But on a serious note, of the people who earn $250K or more (an income level that has been suggested for higher tax rates) there will be a great correlation between the amount of education and the early start to a career. Go to a good university and earn more than the median income in your first job, and you will be well on track to earning $250K. A common misconception is that someone who has not had a great education can still be successful by starting their own company. While there are a few people who have done that, the vast majority of small companies fail in the first few years. Working hard doesn’t guarantee success, for a company to succeed you need to have the right product at the right time – this often depends on factors that you can’t predict (such as the general state of the economy and any new products released by larger companies).