It's hard to see how this would beat Big Tech, where the standard match is 100% up to the 401k limit ($20,500) irrespective of income. Say your salary is $200K at private company, would be $240K at Big Tech. You'll be getting 1.2 * 0.06 * 200 = $14.4K in matching funds. The Big Tech employee would stash the full $20.5K into their 401K, get $20.5K match, and then end up about $35K ahead on post-retirement income.