Do what you will Buddha believed that all things are expressions of the mind, of an objective reality, therefor, Do What You Will means doing what the abstract reality wills.
Meaning, when you are most yourself, when you are one with this reality, then you are manifestation of your pure will and "can't harm", or "only positive".
In today's times, we can interpret it to this: Do what you will, as long as it's in line with the law.
Of course laws can be corrupt, but the same values apply. We are all one mind expressing itself subjectively, therefor, we need governing rules, like the law, in order to maintain order to our subjectivity.
People are more focused on achieving materialistic wealth than abstract wealth, e.g being one with the mind, the universal manner of thinking.
What I'm trying to say is that in today's times, this universal manner of thinking comes through what most agree with: Aspects such as democracy, law, etc.
it's also why philosophy is dying out, because most people fail to see the impact of abstract thinking in a world that is "expressing" its "mind" through materialistic means, such as the ones described above.
Different times, same reality, basically.