Shoplifters fall into several categories.
Some take things they could easily pay for and perhaps do not even want. These offenders may suffer from kleptomania, a neurotic, irresistible impulse to steal. This is almost never done for the purpose of acquiring the item taken. These shoplifters are not necessarily ill or disturbed, they simply steal because it pays. These crimes affect us all as we are forced to pay higher prices, as retailers are forced to raise prices or go out of business.