This question already has an answer here:
So there is this article about how Virgin is allowing employees to take as much vacation leave as they want, as long as they get their work done.
This appears to be a good thing, as it allows a great level of flexibility while still expecting people to do their work rather than disappear suddenly on the eve of a deadline.
However, what if the employer allocates workloads such that it is never possible to take vacation leave? Even with standard working hours and leave procedures, it is fairly common for employers to expect employees to work a lot more than the standard 40-hour week. If this is already a problem as it is, how much worse is it if there isn't a set number of days that are yours to take, and your employer always expects an excessive workload to deliver?
How can one protect oneself from this kind of 'exploitation' (for lack of a better word) in a setting such as Virgin without a clearly defined number of leave days you can take (same argument goes for companies that no longer have a fixed number of hours per week)?