You own comment answers your question. To help the economy you need both. But it is not so important to keep jobs here as it is to create more jobs here. Keep in mind, that with all those "millions" of jobs being exported, our unemployment in this country has not budged more than a fraction of a point (not including the impact of the recession, which is not the result of "exported" jobs).
To have either, you need competition. Prices will go up due to a lack of competition in the delivery of goods and services. Jobs will be lost due to the lack of competition for labor. More competition in both areas will give you both cheaper prices and more jobs.
In the U.S., we have taxes and regulations that too often narrow the competitive playing field in favor of one interested party over another, or the taxes and regulations, in and of themselves, will drive up prices. For example, gas would be at least 30% cheaper if taxes were taken out of the equation. Same as your cell phone bill, etc. etc. Yet even with all those taxes and regulations, your cell phone costs a lot less now then it did ten years ago--thanks to competition.
As for labor, we have regluations like minimum wage and work hour restrictions (and of course, labor unions) that give other countries a competitive edge in that market. Why would a U.S. company open a plant in China? It surely is not out of conveinence. It is beacuse the cost of labor is far less, thus making it advantagous to do so. Sure, it is the companies' quest for higher profit as well. But that is no different than the laborers' quest for higher wages.
The thing is we CAN have our cake and eat it too. When people/individuals have more economic and individual freedom, more wealth is created/produced and thus the cost of living falls. While China is far from supporting individual freedom, as a result of the government allowing much more economic freedom, the whole population of China has become much less poor.
To make a more compelling argument, look at Korea. The people and culture are the same in the North as in the South, but the difference is the political/economic structure. Which one is thriving? Which one is desperatetly poor? What is the political and economic structure of each one. Which has more freedom?
Of course there are those who will argue the merits of free-market capitalism in favor of socialism. However, when one asks how many countries have been impoverised by socialism (too many) versus how many have been impoverished by capitalism (zero), the answer to which provides the most wealth for its people is quite clear. The poor in capitalist economies tend to be far less in numbers and far less severe than those of heavily socialized countries.
The thing is (free market) capitalism, socialism and communism are all capitalist (capitalism is "the means of production"). The difference is who owns and/or controls the capital -- the people/individuals or the state?