I've read most of the postings on this thread relating to 401-k's; particularly with respect to some perceptions and some adivce. My employer may be entirely different than your own, yet the math as stated by many leads me to believe a lack of understanding.
The following are examples:
Employee earns $50,000 per year, defers 6 %.
Deferrals = $3,000 per year
Match = 50% of $3,000 = $1,500
Employee earns $50,000 per year, defers 8 %.
Deferrals = $4,000 per year
Match = 50% of $4,000 = $2,000
The match is certainly based upon the first 50%, but what many have seemingly missed is the question of
50% of what? Do the math, consult your HR if you need clarification. The only exception I've encountered in discussion with friends in other companies is that many companies don't understand that employees are entitled by law to contribute the max. of $14-k per year to a companies 401-k plan.