Your initial statement was a bit more important than you may have thought. At a 0% profit rate, ANY business would have to do something or face being driven out of business. And at a 100% tax rate, well, it would be close to impossible to run a modern business, so the point is moot.
You argue that any tax increase on profits will be sent directly to the consumer. This, however, carries a number of implicit assumptions:
1) Increasing the price will not impact sales: Increasing the price by x% may make fewer consumers buy the product, decreasing the sales by y%. This could easily lead to lower total profits for the corporation.
2) No competition: Competing companies may opt not to increase prices and be able to undercut prices. This allows them to build a larger market share by attracting the customers of those corporations that increased prices.
Regarding your arguments on cutting cost, this will happen regardless of taxation. Any corporation in a Capitalist economy will look for ways to minimize costs in order to become more competitive and drive out competition.
I never understood why people think it's a good idea to enter (or even worse, store) credit card info in a phone. That's the height of stupidity, in my opinion.
It's no less secure than your PC. Actually, the average Joe's automatically-updated iPhone is probably more likely to be free of malware than his Windows PC.
It is also a lot easier to steal Joe's iPhone than it is to break into his apartment and run away with his desktop PC
Hijacking airplanes was much easier back then, because it was much easier to smuggle guns and explosives on board. Often there were little, if any, security checks, making it relatively easy to smuggle guns on board. In turn, guns make crowd control a lot easier. Today, it is extremely difficult to smuggle anything but very primitive weapons on board. And even that requires careful planning and preparation. These primitive weapons makes it comparatively easy for passengers to rush the would-be hijackers. My point is that the security checks actually do increase security. (Some of them are quite obnoxious, and seem to be dictated by airport shops rather than security concerns, though).
One interesting question is if airplane hijacking will get a renaissance when/if 3D printing becomes able to print robust automatic weapons in plastic.
The rule on staying alive as a program manager is to give 'em a number or give 'em a date, but never give 'em both at once.