They do it because the Chinese know we can apply ZERO political Leverage on them to stop it.

If we pi$$ them off about unfair trade practices all they have to do is HINT that they will stop buying (or even worse start Dumping) our billions of dollars of treasury bonds.

The USA is DEPENDENT on China, don't you get it?

If they (China as well as Japan and India) were to stop (or even slow down) buying up our debt our interest rates will SKYROCKET.....and soon, very soon, china will have strong enough of a domestic economy where they could "cut the cord" and be self sufficient (as we used to be in the 50's and 60's)...ask yourself what happens then??? We have no more leverage on China than a Crack Addict has on a Drug Lord.

Read the Book "Crash Proof' by Peter Schiff