You don't understand the situation.
If the unions get card check and the NLRB forces Walmart to hand over the names and addresses of all their employees, all the unions have to do is forge the employees' names to the union petitions and Walmart employees are unionized.
There are consequences to electing a Marxist President twice. This is one of those consequences. One of many.
I think it's the other way around.
The TAXES the Government at ALL levels collect from Walmart would drop substantially if they were unionized, not to mention the drop in retail sales alone because prices would have to be escalated in order to compensate for union wages.and demands.
I can't see the Government killing their "golden goose" to appease the unions.
Walmart currently pays a lot of taxes. Last year, for example, the company paid $7 billion of taxes--a bill that reduced its income before taxes from $22 billion to $15 billion.
If Walmart were to eliminate its $22 billion of income before taxes by giving every employee a raise, it would then pay no taxes. Which wouldn't help our national budget deficit.
I could be wrong but I would guess you would see them close down GM before they unionize Walmart.