LoL! sincere apologies...
in summary, I am cautioning about being infatuated with "the idea of living in America". If u already have a well paying job, u should really and critically evaluate your chances of success in USA, compared with your future success in your home country.
The most popular argument is that people want their kids to get a good american education. this is understandable, but I tell you, sometimes this comes at a loss of opportunity at the parents, and as I have seen, some of these kids that parents work so hard for forget the sacrifices the parents had to go thru.
Also, having a senior position in your home country WILL not always translate to success in USA, and one has to have the mindset to re-train just to compete with zero-experience US-born candidates.
All in all, please do not view US thru' rose colored glasses, but with a realistic attitude, the initial frustrations and bumps on the road will not hurt too much.
Have you ever heard the expression "Migrate to America is for the young and not for the old". It is a saying that for those who tried to migrate to the US at an older age is harder than if you are younger. The U.S is a very competitive country. Like TNDV2008 said, high position in home country sometimes means nothing in the U.S, unless you have international recognition.
For most people comming to the U.S means strating a new life. For those who already built their life and career in their home country for many years, comming to the US could be a very difficult transition because they have to start everything again. This is mostly true for most older immigrants.
For the younger immigrants who is still searching a new life and still looking to build their career. The U.S is a great place to start. Most of them would find it easier to transition.
I too have seen many parents sacrifced their career and life that they build for many years, just so their childrens can have a better life and better education in the U.S. It is also preety common that after couple of years the parents went back to the home country, left their childern in the U.S once they are old enough to live by themselves.