Are you implying that white collar workers don't (usually) vote in favor of their own interests also? I would certainly argue that they do.

Now it perhaps could be argued that white collar workers may take a longer term view when deciding what is in their best interest in comparison to a blue collar worker, but I would argue that those behaviors are in line with how rich/poor people make decisions based on financial pressures.

It's in the interest of blue-collar workers to repeal all laws that empower unions by violating the contracting rights of employers because that will attract investment into the U.S. manufacturing sector. Outlawing all employment contracts except those that give enoemous power to the first crop of employees that votes to form an official union is a short-sighted strategy for improving worker welfare.

Wage growth in the US and Western Europe has been very stagnant over the last 40 years. Meanwhile wages have tripled over the last 20 years in China.

During the "Gilded Age", which unions and their activists regularly fearmonger about, wages grew at the fastest rate in US history. And unlike the post-war era, this wage growth didn't come at the expense of US industry, where unions extracted enormous unsustainable concessions that culminated in major US companies declining or going bankrupt. The wage growth in the late 19th and early 20th century accompanied massive US industrial growth.

The best way to help workers is to embrace Capital. The worse thing you can do is embrace an anti-capitalist ideology.

Sure, Chinese wages grow a lot faster than Western ones. At the same time, Western wages remain quite a bit higher than Chinese ones.

Dropping wages in the West would bring a lot of extra work, at the same time, that work would be paying less. The core thing here is that cost of living, and hence a living wage in the West is higher than in e.g. China. Due to globalization, companies can now arbitrage that difference.