Because it’s “dirty dirty socialism”.
No seriously, there are idiots in the US that believe that and still rail against FDRs new deal.
https://www.huffpost.com/entry/obamas-new-deal-why-the-r_b_1688816
https://historylearning.com/modern-world-history/america-1918/new-deal-opposition/
https://historylearning.com/modern-world-history/america-1918/new-deal-opposition/