Not true! Gina Miller took exactly such a matter all the way to the Supreme Court which found in her favour and against the government.it does not matter that a debate has occurred before MPs take a position.
Remember headlines such as this?
GINA Miller has won her Brexit challenge with the Supreme Court ruling that Theresa May can not trigger Article 50 without the consent of Parliament.
The tory extremists actually believed they could do as they pleased, bypassing normal parliamentary procedure in the process but the learned judges decided otherwise.
That aside, it is not for me to make decisions about the kind of political representation I want, as you remarked previously. It was not me who decided to eschew normal parliamentary mechanisms by permitting a poll to test public opinion on secession from the EU. As we are stuck with a political system, warts and all, then any consideration of the UK's continuing membership of the EU should have been a parliamentary issue arising out of concerns aired in the house. We joined the Common Market as a consensus of parliamentary opinion in the late 1960s and early 1970s favoured seeking entry.
The UK was allowed entry along with Ireland and Denmark at the start of 1973 and following the adoption of a new Referendum Act in 1975, the government of the day used a poll, (non-binding), to ascertain public opinion as to whether or not the country should continue with membership.
The result was better than two-to-one in favour of remaining part of the Common Market.
For me, any decision to leave or continue membership of the EU should have been raised within parliament first but the normal protocols were avoided by certain individuals and small groups with vested interests. Add to that, the tory Party was led at the time by a particularly incompetent and poorly-advised PM and it is not difficult to understand the mess that arose and has remained since 2016.
Tom