If you have wealthy/powerful/connected friends and relatives, they can and will shield you from the consequences of your actions. Rich people make bad choices all the time. Drunk driving for example--how many times have you heard in the news about politicians and business leaders getting DUIs? But they hire expensive lawyers and get off scot free.
If you're poor and have poor friends or no friends, you're going to bear the full brunt of the consequences for every single bad decision you make. When you get in legal trouble, you can't hire a lawyer to protect your rights and interests. You don't have powerful parents who can pay the right person to "make it go away."
On the one hand, I firmly believe in what PG said about, if there are two explanations and one of them gives you an excuse to be lazy, it's probably the other one.
But, the whole choice / consequences meme rings hollow, it's a way for the wealthy to justify whatever awful things they may have done in order to get rich (or that they may have simply been born into it), while talking down to the poor and blaming them for the structural causes of poverty.
It's not just that the poor don't know the consequences of their actions, it's also that they don't have connections with people who can help them deflect the consequences of their actions.