Under the assumption that this isn't bait…
This is a liberal meme. You are *not* free to choose your profession. You are subject to market forces.
If the field you want to work in is saturated, you might have to work for below subsistence wages, or for free in some cases as an unpaid intern or volunteer. In the worst case, you might be unemployable in the area you want to work in.
Do you think walmart workers choose their profession? Why hasn't everyone become a politician, a great athlete or a movie star?
The answer is that there is only room for a few people in those areas and competition is fierce. If you aren't in the minority of people who can hack it, you've got no chance.
The majority of the workforce, by definition, can't do this. If you're in the position of only having average ability, education or wealth, you'd want to be secured from homelessness and starvation.
The only way you're guaranteed to be able to choose your profession is if you carve out a spot with your own money, which requires you to be rich.
I'm a social democrat, so I don't really know how command economies allocate labour, but we want full employment and a good standard of living for the working class.
No, the (moderate) left wants to redistribute the wealth, and we use a progressive tax system to do this. The wealthy get taxed more, and that money goes to pay for food, healthcare and education that goes to the benefit of all.
If you're a poorfag we don't want to tax you more.
Interestingly, in america the most conservative states are also the highest recipients of federal aid, since the great depression and the tenessee valley authority.
Not really in your question, but also keep in mind that most people who recieve government assistance are working at least part time. We call these the 'working poor'.