Part of those "subsistence wages" are the funds which cover your expenses when you aren't working. Whether due to disability, between gigs (part of Smith's detailed discussion of the basis of wages in Book I, Ch. VIII of Wealth of Nations, I recommend it strongly), or in old age.

Your 401k funds are not generally available to you to meet pre-retirement expense needs. There are some exceptions, but in almost all cases, you're very strongly advised not to make use of them: you can borrow against 401k funds, but this 1) costs you the earnings on those funds (part of the basis of the whole concept) and 2) the loan must be repaid (though without interest) if you terminate a relationship with a loan sponsor. Which is to say: at the very time you're most likely to have a cash crunch (you're transitioning employment), you have to repay the loan.

Early distribution is also possible, but with very significant financial penalties.

Your comment is juvenile and specious.