The problem isn't the reward for becoming an MP, it's the cost of campaigning. Candidates are expected to put up £10-30k of their own money to contest a seat. Some spend considerably more.
Personally, I don't think paying MPs more will do much harm, but it won't fix any of the problems with the quality of the politicians we get.
I have no problem with MPS being compensated for their time the problem is they've been compensated despite not doing their jobs. Don't turn up to parliament and don't have a good reason, is it because you're randomly in the US well I guess he wasn't doing your job. No payment.
Any work that MPS do in addition to their jobs as MPS has to be done entirely out of hours and cannot interfere with their duties.
Oh it used to make my blood boil to learn my MP hadn't even bothered to show up for a vote or debate. It still would but I don't keep track of it anymore. It's your godsdamned job, you over-entitled fucks. I don't give a shit if you think it's dull - you wanted it, you got it, now get your arse onto those benches and represent the interests of your constituents. If you don't want to do that, fucking resign.