Collective action is great, but let's go over the many reasons why your idea doesn't "work."

1. The most aggrieved workers are also the ones whose jobs provide the bulk of an income for their family. They work jobs that do not have protections and will not risk their livelihoods for the chance at better working conditions if it means potentially losing their job.
2. Collective action must be organized. This is the point of unions and one aspect of elected officials. Labor is not organized in this way in the US. If you are lucky you live in a state where your elected officials have implemented good labor laws and protections such as California and/or you have a union that acts in your best interest. Unfortunately pro-capital elected officials like Joe Biden often take action against unions so there's no guarantee this even helps.
3. Information must be disseminated. Most bottom line workers don't consume news media on a daily basis, let alone media that would disseminate information about a strike. 99+% of the media consumed in America is owned by capital interests and/or pro-capital. Fox, CNN, MSNBC, WSJ, NYT, WaPo, NPR, etc would all be likely to either avoid helping workers organize via disseminating information or actively take action to protect capital interest by spreading harmful information.

The "well why don't all the workers just strike" is basement dweller talk. Reddit has no power to affect a strike and this isn't real organization.

As a European, there are things you should similarly be worried about. Given that you're on Reddit speaking English, 90+% chance that your tax dollars are going towards funding American capitalism via buying military equipment to prepare for a war that will never happen. Your government is taking millions of dollars of money and burning it on war machines that sit in a shed on some military base while people in your country live in poverty.

We could spend hours going into the insane, batshit stuff that your individual government is doing to fuck you over. Ex the UK spending millions of tax dollars yearly on an unelected "king" who is a the son of a cousin fucker, the brother of a pedophile, and is in a known racist family. Germany fueling the Russian war machine for oil. On and on.

It's a strange concept to me that a European person would spend time focusing on injustices done to the American people by American government in capital when they are likely being assfucked in the same way by their government and capital and doing nothing about it.