No one should lose out on work because of their union role and it is wrong to suggest trade union membership is incompatible with successful business and progressive employment relations. Instead, it is time the vast majority of modern trade union representatives were commended for their dedication in helping workers and companies thrive.
Let's think of all those successful trade unionised businesses: GM, Chrysler, Jaguar, BA, BT, Rover.
No employer in their right mind wants a trade union involved in their business. Because against non-unionised competition, you really don't have much hope. They'll be cheaper and more able to adapt to changes in the market.
The only time a unionised business will do well is when it is up against other unionised businesses, often in highly regulated or business areas with high barriers to entry.