A corporation is simply a company established so that the principal owner’s personal assets (home, car, bank account, etc.) cannot be used to satisfy company debts. Attracting capital for expansion is done by selling stock. The principal stock holder can be the effective owner if he owns over 50%. Other types of ownership include partnerships and sole proprietorships in which the owners put their personal assets at risk. Given this type of arrangement of not being wiped out as a result of a failed business, this country has a huge number of corporations, most of them small. The corporation is the epitome of capitalism in action.
Buying shares in a corporation indeed helps build that organization. Attracting capital this way is excellent because it does not obligate the company to return anything to the investor. This is an excellent way to accumulate wealth and is the foundation of our economy.
Where you are confused is that the vast majority of corporations are small operations, and have little excess cash to hire lobbyists and lawyers. Some of the profits, if they have any, can be used to expand business or be given back to investors in the form of dividends. This is capitalism at work.
When I was 40 years old in 1975, I was flat broke. I learned about capitalism by taking an extension course in the stock market and working for a mutual funds company. My wife and I scraped enough money together to make a down payment on a $48,000 house in West Los Angeles. I sold the house in 2004 for $640,000. In the meantime I had bought shares in several mutual funds, contributed to them regularly, mapped out a retirement plan, managed my wife’s small inheritance, and opened up 401(k) accounts with my employers. For a while I worked as an independent and opened up a Keogh Retirement Plan where I put tax free money away for the future. Now that I have been retired for fourteen years, I can afford to pay for my wife’s care in an Alzheimer’s Nursing Home. I had nothing given to me. I worked my way through college. Should I feel apologetic toward poor people just because I have been successful? That is stupid.