Is corporatism/syndicalism the way to go?

[Cornfed]

This is a system where a corporation is formed to represent each sector of the economy. Within an industry this corporation would select, train and rank workers and act as an advocate for them, similar to a trade union. The corporations would also represent their members in government and negotiate with other corporations on their behalf. The corporations and government could negotiate and plan to achieve important national goals. Some version of this seems to have been practised in most countries that experienced economic success and would seem to be the natural modern alternative to the scourge of liberalism.

[MrMan]

This is a system where a corporation is formed to represent each sector of the economy. Within an industry this corporation would select, train and rank workers and act as an advocate for them, similar to a trade union. The corporations would also represent their members in government and negotiate with other corporations on their behalf. The corporations and government could negotiate and plan to achieve important national goals. Some version of this seems to have been practised in most countries that experienced economic success and would seem to be the natural modern alternative to the scourge of liberalism.

Fascism combined with legalized monopolies with the power of labor unions.

It sounds like a potential disaster, the inefficiencies of labor unions having too much power in an economy combined with the inefficiencies of monopolies. Monopolies do not supply enough goods or services to meet the needs of society because they price too highly unless there is some government intervention or they are government owned. Natural monopolies like companies that have gas lines, electric lines, water and sewage, if they are centralized and government owned generally aren't going to supply the demand.

If there is competition with other systems, labor unions with that kind of power will negotiate wages that are not competitive.

A capitalist system that just sets the rules of the game (e.g. outlaws monopolies or controls them when they are necessary) is more efficient because you have individual actors making the micro-decisions related to the work about which they have expertise, instead of a few decision makers of large companies doing the same.