I am disappointed at the kind of discussion that takes it for granted that monkhood is defined by the question whether you have sex or not. It is nearly ridiculous, I think.
The whole question should be seen in terms of life-style. Life-style is something people can see. People at large can't see your ideas or your right views, but your life-style is something clearly visible.
Begging daily for alms is not considered essential for modern buddhist life-style.
The practice of begging was a daily interface between buddhist community and the wider society.
If you discard daily begging as not being an essential element of monkhood you lose an important interface with the wider human community. And buddhism needs communication more than anything else. There is no Dharma if you only sit and meditate somewhere, and you have a private sponsor to finance it.
Monkhood, or being a practicing laity, is defined by your visible life-style.
Whether you like it or not, there will always be something that people can notice, if you are a practitioner of Dharma. Most likely you yourself don't know or see it.
If you don't beg, what prevents you from working? ( as a monk or a nun).
A monk could equally well be defined by not killing, or by not stealing, or by not lying, or by not slandering, or by some other major precept.
Shramanas constitute an indian life-style, that is quite nonexistent in modern world. You must remenber that Buddhism started as a branch in a wider movement that has been called by the name Shramanas.
Is there anything that somehow or loosely corresponds to Shramanas, in our modern world ?
Maybe the New Age? -Or the Unemployed? -Or the Homeless Vagrants?

