Unions were only "strong" relative to other eras. The workers were still exploited and abused like hell, and it's a process that declined pretty steadily throughout that era. The minimum wage and the reforms it was intended to bring about were hamstrung from the start to prevent the workers from ever achieving that intended level of support and protection.
Even on strict economics, it was a shitshow of a period, and only stands out given
how much worse the Depression and the economic collapses of the '70s through to today have been for the working class, bookending it.
And again; for cishet white men. The same slight bump was
not shared equally across all groups. Women in particular faced a hell of a lot of persecution in workplaces during this era.
The top tax rate also had a hell of a lot more exemptions, and nobody functionally
paid 90%. More like ~40%;
https://taxfoundation.org/taxes-on-t...950s-not-high/