Look, Capital assets are taxed as a part of business. They go down in value as they age. Amortization is the process of writing them off and its tax deductible to reflect that decrease in value.
Another factor is if we begin the process of double taxation, companies will simply incorporate in another country. The way that companies have been fleeing high tax states should tell you that much. If you tax a company too much they will change their physical location if at all possible. Oh, and take the jobs with them.