I am surprised more attention hasn’t been focused on Alphabet earmarking a whopping $30 billion of the proceeds to cover the 2026 calendar year tax obligations associated with the vesting of employee equity awards.

I'm not sure there's anything to talk about here. The vesting of employee equity awards doesn't generate a tax obligation for Alphabet - it generates a tax obligation for its employees. What Alphabet is doing is handling that tax obligation for them.

So in the absence of this arrangement, Alphabet issues $X worth of shares to its vesting employees. Employees need to sell $X*marginal tax rate of those shares to cover their own taxes.

Now, Alphabet will issue $X*(1-tax rate) to its employees. The employees will receive the after-tax proceeds, so will owe no further tax, while Alphabet will pay the cash tax obligation on behalf of its employees.

So rather than issuing a larger pre-tax number of shares to its employees, Alphabet issues a smaller post-tax number of shares to employees ($X*(1-tax rate)) and issues the tax effect-driven number of shares ($X*tax rate) to public.

I don't see any economic difference between the two arrangements, or any reason to be bothered by it.

You can get this information on page 3 of the pdf here:
abc.xyz - Alphabet Announces Proposed Billion Equity Capital Raise to Expand AI Infrastructure and Compute