I believe the Wehrmacht opted for the high-benefit dental plan. Your teeth...or somebody else's.
Ah, the Maginot line. The Germans didn't really outflank it, at least at first, they busted through at one of its strongest points. They could do that because of diplomacy - the Belgians had declared neutrality, and so the French promise to hold the war in Belgium (they used other terms but that's about it) was no longer valid and the Line had to be hastily lengthened. And second, the French had given the Czechs the plans for the structures because for some reason those silly Czechs thought the Germans might have designs on their property. Well, OK, there was that Sudetenland thing... After the Munich agreement the Germans had a nice close look at those structures and a chance to rehearse.
The lesson is that the stripey-pants boys will give away the house for a piece of paper, "peace in our time." And then blame the guys in green pants when the shooting starts. That wasn't a lot of consolation to the poor poilu sitting safe in his bunker and hearing the enemy artillery fire...to his rear.
Then, of course, there was the impenetrable Ardennes forest, which the Germans penetrated not only once, but twice. The second time it was the guys at Bastogne who were hearing enemy artillery fire to the rear. Not a good feeling.
Airpower was completely overlooked.
OF:"“Fixed fortifications are monuments to man’s stupidity.” - George Patton
Didn't the Germans first "bust through" the Ardennes Forest, where there was no Maginot Line?
In fact, the Maginot Line worked just as intended. It forced the Germans to find a way around it. But what the French expected was Germans to advance through Belgium, just as in the First World War. So the French put their best troops along the border with Belgium.
The French did not expect a German advance through the Ardennes, and neither did the Germans, until so to speak, the last hour.
German General von Manstein figured out a way to send armies through the Ardennes, but his plan was rejected by the General Staff before Manstein could present it to Hitler, almost by accident.
Point is: the Maginot Line did what it was supposed to do, forcing the Germans to go around it. And, it took a military genius to figure out how to defeat it. The Germans had a number of these in positions of influence, where the French, sadly, had none.
Later, 1944 & 1945, when the allies went up against the German Atlantic Wall and West Wall (aka "Siegfried Line," here called "Lime Line"), it was a very different story. Unlike 1940, by 1944 the allies outnumbered Germans in both troops and guns by several to one. Plus they had absolute air domination. So major obstacles & formations were simply bombed to smitherenes.
Now it was the Germans, stuck in their fortifications, with no maneuver force to strike at canalized attackers.
Bottom line: at the time, fixed fortifications were a great idea for canalizing the enemy, provided the forts were supported by powerful maneuver forces. When they weren't, which was often the case, they became, as many have noted, useless sitting ducks.