It's important to realize the airlines vs corporate are like comparing apples and oranges.
Your mileage WILL vary. Personally, I don't have a problem with training contracts, provided that they are reasonable. A type rating (even in a common aircraft such as the Citation) can cost upwards of 25,000 for a single event. (Toss in recurrent at $12K/pilot each year and companies put substantial expense into pilots). It is worth noting that if you sign an agreement, you had better be prepared to pay if you break it. Corporations that retain or employ their own lawyers are a lot more likely to come after you. They are also more likely to have contracts that cover some of the loopholes... If nothing else, the corporate world is a small place... it's not difficult to find out who has and who hasn't broken a contract- especially on a local level.
A GOOD corporate job will pay to type rate the RIGHT person, but in this day and age, many are looking for ways to slash the budget. That means hiring people that already have a type. Even if the type isn't current, it's cheaper to send somebody to a recurrent event than the entire initial course.
The other thing to consider is that with many corporate and charter operators closing up, there is now a surplus of qualified candidates. Just like in the airline world, corporate employers can be a lot more picky when choosing candidates...
When the market for pilot swings, you'll see a reduction in the number of jobs that require type + time in type.