The biggest difference is the population and the fact that people fished local. People from KC and STL didn't run to the Ozarks for a weekend.
I've known my share and I would disagree. I've found a lot more giggers will tell you they get away with a lot then bank or boat fishermen do. Much of it is do to opportunity, they fish at night on remote parts of the river and eat the evidence on the river bank. When they have 6 or 8 giggers and another 15-20 family members waiting for a fish fry, they aren't coming in without enough fish. It's no different then the upper Taney and the park fishermen having to live with the reputation created by a few, the giggers who toe the line have to put up with the bad ones and the reputation they create.
The MDC has become overly sensitive to any criticism by groups. I suspect the sale tax is behind much of it. One reason giggers have more success is in the equipment, which has outrun the sports self imposed restrictions. While electronics on a bass boat can show you the fish, it doesn't show you exactly what they are or lead them to bite, but a set of sodium stadium lights on the front of a jon boat does show you what where and even at a depth the old giggers would have never dreamed.
If the MDC would dial the sport back to it's origins most of the violations would cease.