There are bonds and there are bonds?...
3 examples in my experience...
Employer fronts up the cost of the type rating and then clawed it back in 24 monthly deductions from my wage.
Corporate owner pays for the rating with a 2 year bond but through the management company that obviously jacked up the cost to him. After 2 years you are kicked out to be replaced by another non rated guy to do the same.
Owner pays for the rating and you sign a 2 year non decreasing bond! So after 23 months you still owe the full cost of the rating.
Whilst I would never condone anyone jumping a bond (it just makes it all more difficult for all of us) it is not a one way street. Plenty of employers are not playing the game either.