Not an economist, but a lousy CS grad, so my rambling may be incorrect. But honestly, I have no words for your genius. More specifically, the lack of it.

• you ignored inflation around the 1970s
• you did not take into account the cost of living
• you also conveniently ignored the lifestyle choices

Inflation has caused the cumulative price increase of 488.65% in the US from 1975 to 2023-almost-2024. $200,000 in 1975 is around $1,177,295.17 in today's time.

$20 million is just an exaggeration for the light-hearted joke @snekerpimp@lemmy.world made, it's not that deep.

Source: Inflation calculator