It will probably depend on whether or not you have other sources of income and where your average wage falls in the formula. As NW Bound noted, there's a "welfare component" that gets re-distributed to lower-income folks, who get more than a fair return on their contributions. Under the current formula, your benefit is 90% of the first $856 of the average indexed monthly earnings, plus 32% of the next $5,157, plus 15% of the remainder. You can see that lower-income people get a proportionately higher benefit. If you have other sources of income, such as pensions or investments, your SS can be taxed, too.
Right and I've already hit that 2nd bend point. The inflation adjustment on my early earnings actually boost several of those years higher than later years which is an interesting look into how the calculation is actually done. So no, I won't be seeing a very good return on my money which is fine as long as the rules don't change significantly before I can collect. At this point a minimum wage job would change my SS by a few dollars.. not exactly incentive to go find a part time job.