Why was the taft-hartley act passed? to curb union power to allow unions to organize white-collar workers to allow employers to fire union organizers to give workers a minimum wage?

The correct answer is to curb union power.

In this law, there are several different restrictions put on the ability of laborers/workers to strike. For example, a clause within this law makes it so that workers must give 80 day notice in terms of strike. This notice must be given to the company itself along with state and federal agencies. This is done in hopes that a collective bargaining agreement can be agreed upon before the strike even occurs. Before this time,there were no necessary number of days individuals had to wait before striking. 

the objectives of the group are followed