Google doesn't have all that many low-level employees. They are mostly only hiring engineers, who are likely get more money and perks than Apple's retail employ

Google doesn't have all that many low-level employees. They are mostly only hiring engineers, who are likely get more money and perks than Apple's retail employees, or the people, who load trucks for Amazon. It is also worth a lot more for Google to recruit the top employees than many other employers. Hence, they can spend more money on PR and perks to make themselves a more desirable employer. If Google spends 5% of their employment costs on perks, it will go a lot further than Walmart.