On the question "If It Were Larger", quoting Taylor of Stanford:
Individuals and families largely saved the transfers and tax rebates. The federal government increased purchases, but by only an immaterial amount. State and local governments used the stimulus grants to reduce their net borrowing (largely by acquiring more financial assets) rather than to increase expenditures, and they shifted expenditures away from purchases toward transfers. Some argue that the economy would have been worse off without these stimulus packages, but the results do not support that view.
Taylor then opines that "more spending" would have been extremely inefficient, in that the programs were reasonably well-shepherded by Biden. IOW, there wasn't much more to get.
...as we learned from the permanent-income hypothesis that won Milton Friedman his Nobel Prize, some Americans realize all the massive deficit-financed spending of today will ultimately require raising their taxes tomorrow. So short-term changes in income tend to have little impact on how people spend. “New Keynesian” models, like one used by the European Central Bank, sought to incorporate such factors and predicted that the Obama stimulus would have just a fraction of the impact estimated by Romer and other White House economists. Instead of creating 3 million jobs, perhaps the actual total was 600,000
Pethokoukis moves to the '20/'21 recession. The actions there? Cutting Gummint spending, which worked; recall that the economy boomed in that decade.
...But how would such an approach have worked the past few years? Economist Brian Wesbury of First Trust Portfolios thinks the huge increase in government spending under the Obama and Bush administrations has hurt the economy. Cutting it back would boost growth....
Wesbury's model includes factoring that Gummint spending hinders long-term growth--still a bit controversial but not pulled out of the air.
More at the link, including tax-reductions, consumption tax possibilities,.....(and as it turns out, Feldstein and I were on the same wavelength about Gummint purchases.)