When you talk to alot of Chinese people whom are reasonably wealthy and successful and alot of them travel for work or for play they are scrutinized considerably by foreign governments and they are embarrassed to have to show mortgage titles, homes owned, deposit 50,000RMB into guarantee deposits as well as employment contracts and medical checks.
Hk'ers and other western countries have it easy but a Chinese citizen whom is victimized because of their nationality I can understand why they want more freedom to travel or provide for their children.
The current trend of mainland mothers getting their children born in HK is no more than a loophole which the government needs to fix. No different to tax loopholes or other government legislation that allows people to get around a certain law. If you took this out the of equation then there is alot less that HK'ers complain about (but they will find something...).