It depends on which jurisdiction you sign up for, and what reach they have. If you break their training bond the Singaporeans will hunt you down to the ends of the earth. Repossess your house, your wife and your dog. And if you break a bond in your own country - as we say in Oz - you are rooted (word of mouth will precede you because aviation even in a global context is a very small pool).
So don't go there unless you want to go there....