RAISING THE BAR TOO HIGH

CAN ANYONE PLS EXPLAIN THE MEANING OF "RAISING THE BAR TOO HIGH" NAD WHERE TO USE IT
THANKS

Think of the pole vault, or the high jump, from track and field competitions. Contestants have to jump over a crossbar that gets raised gradually, until only one jumper can clear it, and be declared the winner. We can set the bar too low, so that everyone qualifies, or we can set the bar too high, and nobody is capable of winning. We speak of "raising the bar" too high in this sense. A list of chores, or a level of accomplishment, or a set of demands can be made impossibly high.