So, the guy's money is totally wasted because he voluntarily bought a seat which he does not want. That's a good one. And somehow you refer to this as "society's money". You have totally lost me on this one. Perhaps you mean that society has subsidized the arts in your country, so everyone pays through taxes and then you as the concert goer are entitled to sit in the best seat possible, as long as it is available. But wait, you paid for your ticket, so how does that work?
I guess where you go to hear classical concerts, the ushers allow you to move up and get a better seat for free. You almost make it seem like you are making a sport of this. So, you know ahead of time that you are paying a lesser amount for a poor seat, and hoping that you can upgrade for free. Is that what you do? Really? But as I wrote before, it may just be cultural differences.
I thought we were talking about different seating sections for different prices and moving when you see a better seat that is empty than the one you paid for. To me, the practice you describe only makes sense if it is open seating for the same ticket prices. If people are not assigned seats, then it is a free for all and you can go to where you please. That is fine, but that is not what Ron's OP seems to be about. He described a whole plan of attack, seeing the target, and then going for it at the opportune moment. Sounds like you and he are describing different scenarios.