When someone says $500k/year, they usually mean a package like $150k base + $350k stocks with yearly grants.

For the standard 4-year vesting schedule, and assuming a new $350k grant every year, this means actual earnings are:

   Year 1: $150k + $0        $150k
   Year 2: $150k + $87.5k    $237.5k
   Year 3: $150k + $87.5k*2  $325k
   Year 4: $150k + $87.5k*3  $412k

If you leave here, at year 4, and lose all unvested options (expected), your actual average was $281k/year.

Only by year 5 you'll finally actually earn the $500k/year, and the vesting schedule has such an impact on the early earnings that even after a decade, your yearly average is still $400k.

Not to forget taxes. So the idea to "save for one year then take 6 years off" is kinda off the menu unless they've been at the company for a long, long time, or are willing to spend those 6 years living in Thailand.